What engine and drivetrain options are shown on this 1980 GMC build sheet?

The build sheet lists RPO L39 ENG V8-350 CI (350 cubic inch V8), an HE3 3.08 axle, G80 axle lock type (locking differential), K77 55 amp alternator, JB5/J55 power brakes, N41 power steering, and Janesville auto trans routing.

Which dealer originally ordered this truck?

Morris-Smith Buick-GMC Inc, 528 Broad St, Gainesville GA 30501 (zone 53, dealer 154), order number J87996.

What is the VIN and where was the truck built?

The VIN is TKL14AJ512415, built at the GM Assembly Division plant in Janesville, Wisconsin.

When was the truck delivered to its first owner?

The red warranty folder shows a date of delivery to first retail purchaser of 7-25-80, with 0005 miles on the vehicle at delivery.

What do the 4x4 transfer case positions mean per the blue tag?

4L = low range, all four wheels driving, front hubs locked, do not exceed 45 MPH; N = neutral (for power takeoff use); 2H = high range normal two-wheel drive (best fuel economy with hubs free); 4H = high range four-wheel drive with hubs locked. 4L and 4H are for low-traction conditions only (mud, snow, sand) — do not drive on dry pavement.

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1980 GMC Pickup Build Sheet, Owner's Manual & Warranty Docs - Janesville Plant

Spread of 1980 GMC owner's manual, build sheets and warranty literature

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Collection of GMC dealer literature including a 1980 owner's and driver's manual, build sheets, warranty and key-removal cards.

AI caption October 2021 · Photo 39 of 49

This photograph shows the complete original document set delivered with a 1980 GMC pickup truck, laid out for display. Included are: two copies of the factory build (broadcast) sheet from the Janesville, Wisconsin assembly plant showing VIN TKL14AJ512415, order number J87996, delivering dealer Morris-Smith Buick-GMC Inc. of 528 Broad St, Gainesville GA 30501, and a full RPO option code list (L39 350 CI V8, K77 55-amp alternator, HE3 3.08 axle, G80 locking axle, C60 air conditioning, N67 rally wheels, YE5 Sierra Classic trim, P235/75R15 radial tires, C5N 6200 GVW, camel vinyl interior, dark blue paint, cargo weight 1139 lb); the teal X-8000B 1980 GMC Pickups Owner's and Driver's Manual; the 1980 GMC maintenance schedule folder for gasoline light-duty trucks; the red warranty information folder for 1980 GMC Truck 1500–3500 series and Caballero showing delivery on 7-25-80 at 5 miles; a Georgia Inspection Certificate (B 1593864) dated 10-22-81; the part-time 4x4 transfer case shift control tag explaining 4L, N, 2H and 4H positions; a GM ignition key removal/hazard warning card; a catalytic converter information card; a GMC compass installation card; and a General Tire Limited Adjustment Policy folder. Readers can learn the truck's exact factory equipment, ordering dealer, and delivery history.

This document covers 1980, which may differ from this 1969 Pontiac Firebird.

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Frequently asked questions

What engine and drivetrain options are shown on this 1980 GMC build sheet?: The build sheet lists RPO L39 ENG V8-350 CI (350 cubic inch V8), an HE3 3.08 axle, G80 axle lock type (locking differential), K77 55 amp alternator, JB5/J55 power brakes, N41 power steering, and Janesville auto trans routing.
Which dealer originally ordered this truck?: Morris-Smith Buick-GMC Inc, 528 Broad St, Gainesville GA 30501 (zone 53, dealer 154), order number J87996.
What is the VIN and where was the truck built?: The VIN is TKL14AJ512415, built at the GM Assembly Division plant in Janesville, Wisconsin.
When was the truck delivered to its first owner?: The red warranty folder shows a date of delivery to first retail purchaser of 7-25-80, with 0005 miles on the vehicle at delivery.
What do the 4x4 transfer case positions mean per the blue tag?: 4L = low range, all four wheels driving, front hubs locked, do not exceed 45 MPH; N = neutral (for power takeoff use); 2H = high range normal two-wheel drive (best fuel economy with hubs free); 4H = high range four-wheel drive with hubs locked. 4L and 4H are for low-traction conditions only (mud, snow, sand) — do not drive on dry pavement.