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2021 GMC Sierra 1500 Service and Repair Manual
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$49.99 USD
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Covers all 2021 Sierra 1500 trims — AT4 Crew Cab Pickup 4-Door, Base Standard Cab Pickup 2-Door, SLT Crew Cab Pickup 4-Door +6 more ·
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Complete repair procedures
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$49.99
2021 GMC Sierra 1500 Service and Repair Manual
Regular price
$49.99 USD
Unit price
2021 GMC Sierra 1500 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.
What’s included
- Step-by-step repair procedures and service information
- Specifications and reference data (where provided)
- Wiring diagrams and electrical sections
- Powertrain, brakes, steering, suspension, HVAC and more
Trims covered
- AT4 Crew Cab Pickup 4-Door
- Base Standard Cab Pickup 2-Door
- SLT Crew Cab Pickup 4-Door
- Base Extended Cab Pickup 4-Door
- Denali Crew Cab Pickup 4-Door
- SLE Crew Cab Pickup 4-Door
- Base Crew Cab Pickup 4-Door
- SLT Extended Cab Pickup 4-Door
- AT4 Extended Cab Pickup 4-Door
- SLE Extended Cab Pickup 4-Door
- Elevation Crew Cab Pickup 4-Door
- Elevation Extended Cab Pickup 4-Door
Engines covered
- 5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated
- 6.2L 6162CC 376Cu. In. V8 GAS OHV Naturally Aspirated
- 3.0L 2993CC 183Cu. In. l6 DIESEL DOHC Turbocharged
- 5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated
- 4.3L 262Cu. In. V6 GAS OHV Naturally Aspirated
- 2.7L 2720CC 166Cu. In. l4 GAS DOHC Turbocharged
Index / Table of contents
- Body
- Brakes
- Chassis Electrical
- Driveline
- Engine Cooling
- Engine Electrical
- Engine Mechanical
- Engine Performance & Emission Controls
- Fuel System
- General Information & Identification
- Heating, Ventilation, & Air Conditioning
- Hybrid & Electric Vehicle Systems
- Steering
- Suspension
- Transmission, Clutch, & Transfer Case
- Wiring Diagrams
General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camar
Consequence
If a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly rest
Remedy
GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began
General Motors (GM) is recalling certain 2019-2021 GMC Sierra 1500 and Silverado 1500 vehicles equipped with certain accessory road tires and a 17" spare tire. The 17" spare tire provided with the ve
Consequence
An ABS system that does not function properly can increase the risk of a crash.
Remedy
Dealers will provide a new 17" spare tire and wheel assembly that is compatible with the accessory w
General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5, GMC Acadia and Chevrolet Traverse vehicles and 2020-2021 Chevrolet Silverado 1500, GMC Sierra 1500 vehicles. The vehicle
Consequence
Overcured tires may experience a carcass break in the sidewall resulting in a sudden air loss or cou
Remedy
GM will notify owners, and dealers will inspect vehicles and replace tires that have DOT number and
The document advise technicians after an engine repair involving removal of the camshaft actuators, the vehicle may set p1101 P0172 and or stalls when taken off idle. The technician is instructed to verify the intake and exhaust camshaft ac
Improvements to OnStar functionality.
This PI provides diagnostic tips for diagnosing electric trailer brakes issues.
Pi created to provide GM dealers with information on gathering information for projection issue
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
This PI provide diagnostic tip for an SES MIL with DTC P16A7 and/or P16AF. Dealers are to inspect for a loose connection.
This Preliminary information communicates that some customers may comment that after an auto-stop event the engine does not restart and to inspect the engine ground strap. Temporarily on hold while PIE0572 is active. PIE0572 has now ended a
This preliminary information communicates information about how to determine if a wheel and tires size change is available.
Showing the 8 most recent of 1429 technical service bulletins on file with NHTSA.
Airbag system did not deploy but smoke in cabin during a crash. Video of front, rear and inside cabin shows the rear end passenger side impact at an estimated 45-50 MPH. I saw smoke in cabin, distur
⢠The airbag system failed to deploy during a collision that resulted in the total loss of the vehicle. Additionally, the vehicle was operating with a 17â spare tire (undersized compared to the st
⢠The airbag system failed to deploy during a collision that resulted in the total loss of the vehicle. Additionally, the vehicle was operating with a 17â spare tire (undersized compared to the st
I was driving approximately 25-30 mph coming over an overpass moving into the right hand lane when my truck right front end failed. The steering and brakes locked up for approximately 50â until I hi
I was driving approximately 25-30 mph coming over an overpass moving into the right hand lane when my truck right front end failed. The steering and brakes locked up for approximately 50â until I hi
Showing the 5 most serious of 659 complaints filed with NHTSA.
Other Years of the GMC Sierra 1500
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