JEGS Tech Specialist

Pete Mitchell

What Is A Truck Decoder and What Does A Truck Decoder Do?

Your GMC or Chevrolet truck's Vehicle Identification Number (VIN) is more than just a random series of letters and numbers. It's a coded identifier, a key that unlocks a treasure trove of information about your vehicle. From the manufacturing plant to the engine type, every detail is neatly tucked away in this unique alphanumeric sequence. In this comprehensive guide, we'll delve into the art of decoding GM truck VINs, illuminating the fascinating journey of how these codes have evolved over the years. Whether you own a classic from the late '60s or a modern-day workhorse, understanding your truck's VIN is your ticket to uncovering its rich history and specifications. So, join us on this journey through time as we decode the secrets of your GM truck's VIN, from the early years of the '60s to the present day.

What Are The Parts Of A GM Truck VIN Number?

The Vehicle Identification Number (VIN) on your GMC or Chevrolet truck is like its unique genetic code. It provides a wealth of information about your vehicle's make, model, year, and more. Let's break down the different components of a GM truck VIN:

1. World Manufacturer Identifier (WMI): The first three characters of the VIN represent the WMI, which identifies the vehicle's country of origin and manufacturer. For GMC and Chevrolet trucks, look for "1GC" or "1GT," where "1" signifies the United States, "G" designates General Motors, and "C" or "T" specifies Chevrolet or GMC, respectively.

2. Vehicle Descriptor Section (VDS): Characters 4 through 8 of the VIN provide information about your truck's model, body style, engine type, and series. For instance, "CS107" might indicate a Chevrolet truck with a half-ton (10) series and a V8 engine (7).

3. Check Digit: The ninth character is a check digit used to verify the accuracy of the VIN.

4. Model Year: The tenth character represents the model year, using a letter code. For example, "B" stands for 1981.

5. Assembly Plant: Character 11 identifies the assembly plant where your truck was manufactured.

6. Production Number: The last six digits of the VIN make up the production number, which is unique to your vehicle.

Where You Can Find Your GM Truck VIN?

Locating your GM truck's VIN is easy, and it's in the same place for most models, depending on the year. Check these common locations:

• Driver's Side Dashboard: The VIN is typically visible through the windshield on the driver's side dashboard, near the base of the windshield.
• Driver's Side Door Frame: You can also find the VIN on a sticker or plate attached to the driver's side door frame, visible when opening the door near the striker.
• Vehicle Title and Registration: Your VIN is listed on your vehicle title and registration documents.
• Under the Hood: In some trucks, especially older models, you might find the VIN on the radiator support bracket or under the hood,.on a sticker or decal

GM Truck VIN Decoder Examples

Chevrolet or GMC VIN decoding might seem like a complex task, but it's a valuable skill for understanding your vehicle better. Let's explore how GMC and Chevrolet truck VIN numbers differ from different eras:

1947-1952 VIN Decoding

• First Digit or First & Second Digit = Assembly Plant, with 1=Flint, MI, 2=Tarrytown, NY, 3=St. Louis, MO, 5=Kansas City, KS, 6=Oakland, CA, 8 = Atlanta, GA, 9=Norwood, OH, 12= Buffalo, NY, 14=Baltimore, MD, 20=Los Angeles, CA, 21=Janesville, WI,
• Second Digit = Model Year, with E= 1947, F=1948, G=1949, H=1950, J=1951, K=1952
• Third Digit = Series, with P= 3100 1/2-ton with 116" wheelbase, R= 3600 3/4-ton with 125" wheelbase, and S=3800 1-ton with 137" wheelbase
• Fourth Digit = Build Month, with A = January, B=February, C=March, D=April, E=May, F=June, G=July, H=August, I=September, J=October, K=November, L=December
• Fifth Through Eight Digits = Sequential Serial Number At Plant Truck Was Manufactured

1953-1959 VIN Decoding

• First Digit = Engine Type, with a "Blank" space="Standard Engine"(6-Cylinder) and V=V8 engine
• Second Digit or Second & Third Digits = Series, with H = 3100 (1953-1955 1st Series), J=3600 (1953-1955 1st Series), H2=3100 (1955 2nd Series), M2=3200 (1955 2nd Series), J2=3600 (1955 2nd Series), 3A=3100 (1956-1959), 3B=3200 (1956-1959), 3E=3600 (1956-1959)
• Third & Fourth Digits = Year of Production, with 53 =1953, 54=1954, 55=1955, 56=1956, 57=1957, 58=1958, and 59=1959
• Fifth Digit = Assembly Plant, with A = Atlanta, GA, B=Baltimore, MD, F=Flint, MI, J=Janesville, WI, K=Kansas City, KS, L=Los Angeles, CA, N=Norwood, OH, O=Oakland, CA, P=Pontiac, MI, S=St. Louis, MO, T=Tarrytown, NY, W=Willow Run, MI
• Sixth Through Ninth Digits = Sequential Serial Number At Plant Truck Was Manufactured

1960-1966 VIN Decoding

1960-1964 Models

• First Digit = Model Year, with 0=1960, 1=1961, 2=1962, 3=1963, and 4=1964
• Second Digit = Chassis Type, with C = 2WD and K=4WD
• Third & Fourth Digits = Series, with 14= 1/2-ton short bed with 115" wheelbase, 15=1/2-ton long bed with 127" wheelbase, and 25=3/4-ton long bed with 127" wheelbase
• Fifth Digit = Body Type, with 4 for "Pickup"
• Sixth Digit = Assembly Plant, with A = Atlanta, GA, B=Baltimore, MD, F=Flint, MI, J=Janesville, WI, K=Kansas City, KS, N=Norwood, OH,P=Pontiac, MI, S=St. Louis, MO, T=Tarrytown, NY, Z=Fremont, CA, 1 = Oshawa, Ontario
• Seventh Through Twelfth Digits = Sequential Serial Number At Plant Truck Was Manufactured

1965-1966 Models

• First Digit = Chassis Type, with C = 2WD and K=4WD
• Second & Third Digits = Series, with 14= 1/2-ton short bed with 115" wheelbase, 15=1/2-ton long bed with 127" wheelbase, and 25=3/4-ton long bed with 127" wheelbase
• Fourth Digit = Body Type, with 4 for "Pickup"
• Fifth Digit = Model Year, with 5=1965 and 6=1966
• Sixth Digit = Assembly Plant, with A = Atlanta, GA, B=Baltimore, MD, F=Flint, MI, J=Janesville, WI, K=Kansas City, KS, N=Norwood, OH,P=Pontiac, MI, S=St. Louis, MO, T=Tarrytown, NY, Z=Fremont, CA, 1 = Oshawa, Ontario
• Seventh Through Twelfth Digits = Sequential Serial Number At Plant Truck Was Manufactured

1967-1972 VIN Decoding

• First Digit = Chassis Type, either C for 2-wheel drive or K for 4-wheel drive
• Second Digit = Engine Type, either E = V8 or S = 6-Cylinder
• Third Digit = GVW Range, with 1=1/2-Ton, 2=3/4-Ton, 3=1-Ton
• Fourth Digit = Body Type, with 4 for "Pickup"
• Fifth Digit = Year, with 7=1967, 8=1968, 9=1969, 0=1970, 1 = 1971, and 2=1972
• Sixth Digit = Assembly Plant, with A = Atlanta, GA, B=Baltimore, MD, F=Flint, MI, J=Janesville, WI, N=Norwood, OH,P=Pontiac, MI, S=St. Louis, MO, T=Tarrytown, NY, Z=Fremont, CA, 1 = Oshawa, Ontario
• Seventh Through Twelfth Digits = Sequential Serial Number At Plant Truck Was Manufactured

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1973-1980 Chevy & GM VIN Decoder

• First Digit = Division, either C for Chevrolet or T for GMC
• Second Digit = Chassis Type, with C for 2-Wheel Drive and K for 4-Wheel Drive
• Third Digit = Engine Type And Size
  • 1973-1975, Q = 250 6-Cylinder, T= 292 6-Cylinder, X = 307 V8, V=350 2-Barrel V8, Y=350 4-Barrel V8, U= 400 4-Barrel V8, Z= 454 4-Barrel V8
  • 1976, D = 250 6-Cylinder, T=292 6-Cylinder, Q=305 2-Barrel V8, V=350 2-Barrel V8, L=350 4-Barrel V8, U=400 4-Barrel V8, S= 454 4-Barrel V8
  • 1977, D = 250 6-Cylinder, T=292 6-Cylinder, U=305 V8, L=350 4-Barrel V8, R=400 4-Barrel V8, S=454 4-Barrel V8
  • 1978, D = 250 6-Cylinder, T=292 6-Cylinder, U=305 V8, L=350 4-Barrel V8, R=400 4-Barrel V8, S=454 4-Barrel V8, Z = 350 Diesel V8
  • 1979, D = 250 6-Cylinder, T=292 6-Cylinder, U=305 V8, L=350 4-Barrel V8, R=400 V8, S=454 V8, Z = 350 Diesel V8
  • 1980, D = 250 6-Cylinder, T=292 6-Cylinder, G=305 V8, L=350 4-Barrel V8, M=350 4-Barrel V8, R=454 4-Barrel V8, W=454 V8, Z = 350 Diesel V8
• Fourth Digit = Vehicle Series with 1=10 (Chevy) or 15 (GMC) 1/2-ton, 2=20 (Chevy) or 25 (GMC) 3/4-ton, 3=30 (Chevy) or 35 (GMC)1-ton
• Fifth Digit = Body Type, with 2 = Chassis Only, 3 = Cab and Chassis, 4 = Pickup, 5=Panel, 6=Suburban, 7=Motorhome, and 8=Utility
• Sixth Digit = Assembly Plant, with A = Lakewood, GA, B=Baltimore, MD, F=Flint, MI, J=Janesville, WI, S=St. Louis, MO, V=Pontiac, MI, Z=Fremont, CA
• Seventh Digit = Year, with 3 = 1973, 4=1974, 5=1975, 6=1976, 7=1977, 8=1978, 9=1979, A=1980
• Eighth Through Thirteenth Digits = Sequential Serial Number At Plant Truck Was Manufactured

1981-1998 Chevy & GM Truck VIN Decoder Chart

• 17 Characters: Similar to the 1973-1980 VINs, these VINs are 17 characters long.
  • First Digit = Country of Manufacturer, with 1 for United States, 2 for Canada, 3 for Mexico
  • Second and Third Digits= Division, with GC for Chevrolet and GT for GMC
  • Fourth Digit = GVW Range, with C = 4001-5000 lbs, D=5001-6000 lbs, E=6001-7000 lbs, F=7001-8000 lbs,G=8001-9000 lbs, H=9001-10,000 lbs, J=10001-14000 lbs, K=14001-16000 lbs
  • Fifth Digit = Drive & Chassis Type, with C = 2WD (and 1981-1986 chassis), K=4WD (and 1981-1986 chassis), R=2WD and 1987-1989 chassis, and V=4WD and 1987-1989 chassis
  • Sixth Digit = Series, with 1 = 1/2-ton, 2=3/4-ton, 3=1-ton
  • Seventh Digit = Body type, with 3 = 4-door cab, 4 = 2-door cab, 6=Suburban, 8 = 2-door SUV, 9=Extended cab
  • Eighth Digit = Engine Type and Size
    • 1981, D for 250 6-Cylinder, T for 292 6-Cylinder, G for 305 2-Barrel V8, H for 305 4-Barrel V8, L for 350 V8, M for HD 350 V8, Z for 350 Diesel V8, and W for 454 V8
    • 1982-1984, D for 250 6-Cylinder, T for 292 6-Cylinder, H for 305 V8, L for 350 V8, M for HD 350 V8, C for 6.2 Diesel V8, J for 6.2 Diesel V8, and W for 454 V8
    • 1985-1986, T for 292 6-Cylinder, N for 262 V6, H for 305 V8, L for 350 V8, M for HD 350 V8, C for 6.2 Diesel V8, J for 6.2 Diesel V8, and W for 454 V8
    • 1987, T for 292 6-Cylinder, Z for 262 V6, H for 305 TBI V8, K for 350 TBI V8, C for 6.2 Diesel V8, J for 6.2 Diesel V8, and W for 454 4-Barrel V8, and N for 454 TBI V8
    • 1988-1989, T for 292 6-Cylinder, K for 350 TBI V8, C for 6.2 Diesel V8, J for 6.2 Diesel V8, and N for 454 TBI V8
    • 1990-1991, K for 350 TBI V8, C for 6.2 Diesel V8, J for 6.2 Diesel V8, and N for 454 TBI V8
    • 1992-1998, K for 350 TBI V8, C for 6.2 Diesel V8, F for 6.5 Turbo Diesel V8, H for 5.0 TBI V8 J for 6.2 Diesel V8(1988-93)7.4 Vortec V8(1996-1998), M for 5.0 Vortec V8, N for 454 TBI V8, P for 6.5 Diesel V8, R for 5.7 Vortec V8, S for 6.5 Turbo Diesel V8, W for 4.3 Vortec V6, Z for 4.3 TBI V6
  • Ninth Digit = Check Digit
  • Tenth Digit = Model year, with B for 1981, C for 1982, D for 1983, E for 1984,F for 1985, G for 1986, H for 1987, J for 1988, and K for 1989, L for 1990, M for 1991, N for 1992, P for 1993, R for 1994, S for 1995, T for 1996, V for 1997, W for 1998
  • Eleventh Digit = Assembly Plant, with F for Flint, MI, J for Janesville, WI, S for St. Louis, MO, Z for Fremont, CA, E for Pontiac, MI, G for Silao, Mexico, M for Mexico, R for Arlington, TX, and 1 for Oshawa, Ontario
  • Twelfth through Seventeenth Digits = Sequential Serial Number At Assembly Plant

1999-2009 Chevrolet & GM Truck VIN Decoder Chart

• First Digit = Country of Manufacturer, with 1 for United States, 2 for Canada, 3 for Mexico
• Second and Third Digits= Division, with GC for Chevrolet Truck, GN for Chevrolet SUV, GK for GMC SUV and GT for GMC Truck
• Fourth Digit = GVW Range, with E=6001-7000 lbs., F=7001-8000 lbs., G=8001-9000 lbs., H=9001-10,000 lbs., and J=10001-14000 lbs.
• Fifth Digit = Drive & Chassis Type, with C = 2WD and K=4WD
• Sixth Digit = Series, with 1999-2007 - 1 = 1/2-ton, 2=3/4-ton, 3=1-ton, and 6 = 1/2-ton Luxury (for example, Denali) and 2008-2009 - 1 = 1/2Ton Chevy/GMC Work Truck, Chevy LS, GMC SL Trim, 2 = 1/2 Ton Chevy LT, GMC SLE Trim, 3 = 1/2 Ton Chevy LTZ, GMC SLT Trim, 4 = 3/4 Ton Chevy, GMC Work Truck, Chevy LS, GMC SL Trim, 5 = 3/4 Ton Chevy LT, GMC SLE Trim, 6 = 3/4 Ton Chevy LTZ, GMC SLT Trim, 7 = 1 Ton Chevy/GMC Work Truck, 8 = 1 Ton Chevy LT, GMC SLE Trim, 9 = 1 Ton Chevy LTZ, GMC SLT Trim, and 0 = 1/2 Ton GMC Denali
• Seventh Digit = Body type, with 3 = 4 Door Crew Cab or Tahoe / Yukon, 4 = 2 Door Cab, 6 = Suburban / Yukon XL, and 9 = Extended Cab
• Eighth Digit = Engine Type and Size
  • 1999-2000 - T = 5.3L V8 U = 6.0L V8 V = 4.8L V8 W = 4.3L V6
  • 2001 G = 8.1L V8 T = 5.3L V8 U = 6.0L V8 V = 4.8L V8 W = 4.3L V6 1 = 6.6L V8 Diesel
  • 2002 G = 8.1L V8 N = 6.0L V8 T = 5.3L V8 U = 6.0L V8 V = 4.8L V8 W = 4.3L V6 X = 4.3L V6 Z = 5.3L V8 Flex 1 = 6.6L V8 Diesel
  • 2003 G = 8.1L V8 N = 6.0L V8 T = 5.3L V8 U = 6.0L V8 V = 4.8L V8 X = 4.3L V6 Z = 5.3L V8 Flex 1 = 6.6L V8 Diesel
  • 2004 G = 8.1L V8 N = 6.0L V8 T = 5.3L V8 U = 6.0L V8 V = 4.8L V8 X = 4.3L V6 Z = 5.3L V8 Flex 1 = 6.6L V8 Diesel 2 = 6.6L V8 Diesel
  • 2005 B = 5.3L V8 G = 8.1L V8 N = 6.0L V8 T = 5.3L V8 U = 6.0L V8 V = 4.8L V8 X = 4.3L V6 Z = 5.3L V8 Flex 2 = 6.6L V8 Diesel
  • 2006 B = 5.3L V8 D = 6.6L V8 Diesel G = 8.1L V8 N = 6.0L V8 T = 5.3L V8 U = 6.0L V8 V = 4.8L V8 X = 4.3L V6 Z = 5.3L V8 Flex 2 = 6.6L V8 Diesel
  • 2007 B = 5.3L V8 D = 6.6L V8 Diesel G = 8.1L V8 N = 6.0L V8 T = 5.3L V8 U = 6.0L V8 V = 4.8L V8 X = 4.3L V6 Z = 5.3L V8 Flex
  • 2007-09 New Body C = 4.8L V8 J = 5.3L V8 K = 6.0L V8 M = 5.3L V8 X = 4.3L V6 Y = 6.0L V8 0 = 5.3L V8 2 = 6.2L V8 3 = 5.3L V8 Flex 5 = 6.0L V8 Hybrid 6 = 6.6L V8 Diesel 8 = 6.2L V8
• Ninth Digit = Check Digit
• Tenth Digit = Model year, with X = 1999 Y = 2000 1 = 2001 2 = 2002 3 = 2003 4 = 2004 5 = 2005 6 = 2006 7 = 2007 8 = 2008 9 = 2009
• Eleventh Digit = Assembly Plant, with 1 = Oshawa, Ontario E = Pontiac, MI F = Flint, MI G = Silao, Mexico J = Janesville, WI R = Arlington, TX Z = Fort Wayne, IN
• Twelfth through Seventeenth Digits = Sequential Serial Number At Assembly Plant

2010-2013 Chevy & GM Truck VIN Number Decoder

• First Digit = Country of Manufacturer, with 1 for United States, and 3 for Mexico
• Second and Third Digits= Division, with GC for Chevrolet Truck, GN for Chevrolet SUV, GK for GMC SUV and GT for GMC Truck
• Fourth Digit = Body Type and GVW Range,
  • 2010 - Standard Cab P = 6,001-7,000lbs 3=9,001-10,000lbs 6 = 10,001-14,000lbs Extended Cab S = 6,001-7,000lbs Y = 7,001-8,000lbs 5 = 9,001-10,000lbs 8 = 10,001-14,000lbs, Crew Cab R = 6,001-7,000lbs X = 7,001-8,000lbs 4 = 9,001-10,000lbs 7 = 10,001-14,000lbs SUV U = 7,001-8,000lbs Z = 8,001-9,000lbs
  • 2011-2013 - Standard Cab N = 6,001-7,000lbs 0=9,001-10,000lbs 3 = 10,001-14,000lbs Extended Cab R = 6,001-7,000lbs V = 7,001-8,000lbs 2 = 9,001-10,000lbs 5 = 10,001-14,000lbs, Crew Cab P = 6,001-7,000lbs U = 7,001-8,000lbs 1 = 9,001-10,000lbs 4 = 10,001-14,000lbs SUV (2011) T = 7,001-8,000lbs X = 8,001-9,000lbs SUV (2012-13) M = 6,001-7,000lbs T = 7,001-8,000lbs
• Fifth Digit = Drive & Chassis Type, with C = 2WD and K=4WD
• Sixth Digit = Series and Trim
  • Chevrolet A = Tahoe LS B = Tahoe LT C = Tahoe LTZ D = Tahoe Hybrid H = 1500 Suburban LS J = 1500 Suburban LT K = 1500 Suburban LTZ L = 2500 Suburban LS M = 2500 Suburban LT N = 2500 Suburban LTZ, P = 1500 Silverado Work Truck R = 1500 Silverado LS S = 1500 Silverado LT T = 1500 Silverado LTZ U = 1500 Silverado Hybrid V = 2500 Silverado Work Truck X = 2500 Silverado LT Y = 2500 Silverado LTZ Z = 3500 Silverado Work Truck 0 = 3500 Silverado LT 1 = 3500 Silverado LTZ
  • GMC A = Yukon SLE1 B = Yukon SLE2 C = Yukon SLT1 D = Yukon SLT2 E = Yukon Denali F = Yukon Hybrid G = Yukon Denali Hybrid H = 1500 Yukon XL SLE1 J = 1500 Yukon XL SLE2 K = 1500 Yukon XL SLT1 L = 1500 Yukon XL SLT2 M = 1500 Yukon XL Denali N = 2500 Yukon XL SLE1 P = 2500 Yukon XL SLE2 R = 2500 Yukon XL SLT1, S = 2500 Yukon XL SLT2 T = 1500 Sierra Work Truck U = 1500 Sierra SL V = 1500 Sierra SLE W = 1500 Sierra SLT X = 1500 Sierra Denali Y = 1500 Sierra Hybrid Z = 2500 Sierra Work Truck 0 = 2500 Sierra SLE 1 = 2500 Sierra SLT 2 = 3500 Sierra Work Truck 3 = 3500 Sierra SLE 4 = 3500 Sierra SLT 5 = 2500 Sierra Denali 6 = 3500 Sierra Denali
• Seventh Digit = Restraint Code, with A = Front Driver Airbag B = Front Driver and Passenger Airbag C = Front Driver and Passenger Airbag, Front Seat Side Airbags D = Front Driver and Passenger Airbag, Side Curtain Airbags E = Front Driver and Passenger Airbag, Front Seat Side Airbags, Side Curtain Airbags F = Front Driver Airbag, Seat Side Airbags
• Eighth Digit = Engine Type and Size
  • A = 4.8L V8 (L20) B = 6.0L V8 CNG (LC8) F = 6.2L V8 (L94) G = 6.0L V8 (L96) J = 6.0L V8 (LZ1) K = 6.0L V8 (LY6) L = 6.6L V8 Diesel (LGH) P = 5.3L V8 (LH9), X = 4.3L V6 (LU3) 0 = 5.3L V8 (LMG) 2 = 6.2L V8 (LH9) 3 = 5.3L V8 (LC9) 4 = 5.3L V8 (LMF) 6 = 6.6L V8 Diesel (LMM) 7 = 5.3L V8 (LFW) 8 = 6.6L V8 Diesel (LML)
• Ninth Digit = Check Digit
• Tenth Digit = Model year, with A = 2010, B = 2011, C = 2012, D = 2013
• Eleventh Digit = Assembly Plant, with F = Flint, MI R = Arlington, TX, Z = Fort Wayne, IN, and G = Silao, Mexico
• Twelfth through Seventeenth Digits = Sequential Serial Number At Assembly Plant

2014-2019 VIN Decoding

• First Digit = Country of Manufacturer, with 1 for United States, and 3 for Mexico
• Second and Third Digits= Division, with GC for Chevrolet Truck, GN for Chevrolet SUV, GK for GMC SUV and GT for GMC Truck
• Fourth Digit = Body Type and GVW Range
  • N = 6001-7000, 03 Body Style, P=6001-7000, 43 Body Style, R=6001-7000, 53 Body Style, U=7001-8000, 43 Body Style, V=7001-8000, 53 Body Style
• Fifth Digit = Drive & Chassis Type, with C = 2WD and K=4WD
• Sixth Digit = Series and Trim
  • P= 1500 Chevrolet Silverado Work Truck/Fleet/Base
  • R= 1500 Chevrolet Silverado LT
  • S= 1500 Chevrolet Silverado LTZ
  • T= 1500 Chevrolet Silverado High Country
  • 9= Chevrolet Silverado (Non-US/Canada Export)
• Seventh Digit = Restraint Code, with E = Active manual belts, airbags for both front (first row) driver & passenger, front seat side, roof side for all seating rows
• Eighth Digit = Engine Type and Size
  • C= L83 - V8 Gas, 5.3L, SIDI VVT, AFM, E85 Max, Aluminum
  • H= LV3 - V6 Gas, 4.3L, SIDI VVT, OHV, E85 Max, Aluminum
  • J= L86 - V8 Gas, 6.2L, SIDI, VVT, AFM, E85 Max, Aluminum
  • P= LV1 - V6 Gas, 4.3L, SIDI, VVT, E85 Max, Cast Iron
• Ninth Digit = Check Digit
• Tenth Digit = Model year, with E= 2014
• Eleventh Digit = Assembly Plant, with Z = Fort Wayne, IN, and G = Silao, Mexico
• Twelfth through Seventeenth Digits = Sequential Serial Number At Assembly Plant

2020-Present VIN Decoding

• First Digit = Country of Manufacturer, with 1 for United States, and 3 for Mexico
• Second and Third Digits= Division, with GC for Chevrolet Truck, GN for Chevrolet SUV, GK for GMC SUV and GT for GMC Truck
• Fourth Digit = Body Type and GVW Range
  • N = 6001-7000, 03 Body Style (Commercial Special Cutaway, Two (2) Door Cab pick-up, Motor Home Chassis), P=6001-7000, 43 Body Style(Four (4) Door Crew Cab/Utility), R=6001-7000, 53 Body Style (Extended Cab), U=7001-8000, 43 Body Style(Four (4) Door Crew Cab/Utility), V=7001-8000, 53 Body Style(Extended Cab), 0 =9001-10000 03 Body Style (Commercial Special Cutaway, Two (2) Door Cab pick-up, Motor Home Chassis), 1=9001-10000 43 Body Style(Four (4) Door Crew Cab/Utility), 2= 9001-10000 53 Body Style(Extended Cab), 3=10001-14000 03 Body Style (Commercial Special Cutaway, Two (2) Door Cab pick-up, Motor Home Chassis) 4=10001-14000, 43 Body Style(Four (4) Door Crew Cab/Utility) 5=10001-14000, 53 Body Style(Extended Cab)
• Fifth Digit = Drive & Chassis Type, with W = 2WD and Y=4WD
• Sixth Digit = Series and Trim
  • A: 1500 Chevrolet Silverado Work Truck
  • B: 1500 Chevrolet Silverado Custom
  • C:1500 Chevrolet Silverado LT
  • D:1500 Chevrolet Silverado RST
  • E: 1500 Chevrolet Silverado LTZ
  • F: 1500 Chevrolet Silverado High Country
  • L: 2500 Chevrolet Silverado Work Truck
  • M:2500 Chevrolet Silverado Custom
  • N:2500 Chevrolet Silverado LT
  • P: 2500 Chevrolet Silverado LTZ
  • R:3500 Chevrolet Silverado Work Truck
  • S: 3500 Chevrolet Silverado LT
  • T: 3500 Chevrolet Silverado LTZ
  • 9: Chevrolet Silverado (Non-US, Non-Canada)
• Seventh Digit = Restraint Code, with E = Active manual belts, airbags for both front (first row) driver & passenger, front seat side, roof side for all seating rows
• Eighth Digit = Engine Type and Size
  • D: L84 -ENGINE GAS, 8 CYL, 5.3L, DI, DFM, ALUM, GEN 5, VAR 2
  • F: L82 - ENGINE GAS, 8 CYL, 5.3L, DI, AFM, ALUM, GEN 5, VAR 1
  • H: LV3 - ENGINE GAS, 6 CYL, 4.3L, GEN 5, SIDI, V6, VVT, OHV, E85 MAX, Aluminum
  • K: L3B - ENGINE GAS, 4 CYL, L4, 2.7L, SIDI, VVT, TURBO, DOHC, Aluminum
  • L: L87 - ENGINE GAS, 8 CYL, V8, 6.2L, DI AFM, ALUM, GEN 5
  • T: LM2 - ENGINE DIESEL, 6 CYL, 3.0L, CRI, L6, DOHC, TURBO, VGT, Aluminum
  • Y: L5P - ENGINE DIESEL, 8 CYL, 6.6L, DI, V8, TURBO, DURAMAX, GEN 5, VAR 1
  • 7: L8T - ENGINE GAS, 8 CYL, 6.6L, SIDI, VVT, CAST IRON
• Ninth Digit = Check Digit
• Tenth Digit = Model year, with L= 2020
• Eleventh Digit = Assembly Plant, with F= Flint, MI, Z = Fort Wayne, IN, and G = Silao, Mexico
• Twelfth through Seventeenth Digits = Sequential Serial Number At Assembly Plant

Decoding your GM truck's VIN is like unlocking a time capsule that reveals its history and specifications. Whether you're restoring a classic or simply curious about your modern-day workhorse, this guide equips you with the knowledge to decipher the secrets hidden within those alphanumeric characters. Understanding your truck's VIN is a vital skill for any truck owner, enabling you to make informed decisions, verify authenticity, and appreciate the unique history of your vehicle.

If you have any questions or need further assistance with your GM truck's VIN decoding, feel free to reach out to us at JEGS High Performance. We're here to help you on your automotive journey.