Auto Parts Search


      Over 40 million used auto parts online. Shop online for auto and truck parts and save up to 75%

Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!
Help me findSearch
Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 GMC K1500 Pickup car and truck repair procedures including GMC engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up & drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix your 1991 GMC K1500 Pickup automobile. Try the Automotix DIY solution today!
DIY REPAIR SAMPLES > CONTINUE EXPLORING >

We have info for following modifications of 1991 GMC K1500 Pickup

  • 1991 GMC K1500 Pickup Sierra 4.3 V6 GAS, CID:262, Fuel Injection, Aspiration:262, Engine VIN:, Desg:Z
  • 1991 GMC K1500 Pickup Sierra 5.0 V8 GAS, CID:305, Fuel Injection, Aspiration:305, Engine VIN:, Desg:H
  • 1991 GMC K1500 Pickup Sierra 5.7 V8 GAS, CID:350, Fuel Injection, Aspiration:350, Engine VIN:, Desg:K
  • 1991 GMC K1500 Pickup Sierra 6.2 V8 DIESEL, CID:379, Fuel Injection, Aspiration:379, Engine VIN:, Desg:C
  • 1991 GMC K1500 Pickup Sierra XC 4.3 V6 GAS, CID:262, Fuel Injection, Aspiration:262, Engine VIN:, Desg:Z
  • 1991 GMC K1500 Pickup Sierra XC 5.0 V8 GAS, CID:305, Fuel Injection, Aspiration:305, Engine VIN:, Desg:H
  • 1991 GMC K1500 Pickup Sierra XC 5.7 V8 GAS, CID:350, Fuel Injection, Aspiration:350, Engine VIN:, Desg:K
  • 1991 GMC K1500 Pickup Sierra XC 6.2 V8 DIESEL, CID:379, Fuel Injection, Aspiration:379, Engine VIN:, Desg:C

BRAKE SERVICE PROCEDURES FOR 1991 GMC K1500 Pickup AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 GMC K1500 Pickup cars and light trucks from 1990+.

DRUM BRAKES, GENERAL MOTORS -> Drum Brake Service -> Installation -> 1990-91 C & K SERIES w/NON-SERVO BRAKES -> EXCEPT TRACKER, 1990-91 C & K SERIES w/NON-SERVO BRAKES -> TRACKER
Vehicle: 1991 GMC K1500 Pickup Sierra XC 6.2 V8 DIESEL

EXCEPT TRACKER, 1990-91 C & K SERIES w/NON-SERVO BRAKES

  • Lubricate parking brake lever fulcrum with suitable brake lube, then attach lever to brake shoe. Ensure lever operates smoothly.
  • Connect brake shoes with adjusting screw spring, then position adjusting screw. Ensure adjusting screw star wheel does not contact adjusting screw spring after installation, and also ensure RH thread adjusting screw is installed on left side of vehicle and LH thread adjusting screw is installed on right side of vehicle. When brake shoe installation is completed, ensure star wheel lines up with adjustin...

CLICK HERE TO GET FULL ACCESS TO 1991 GMC K1500 Pickup BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1991 GMC K1500 Pickup AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 GMC K1500 Pickup cars and light trucks from 1990+.

POWER BRAKE UNITS, GENERAL MOTORS -> Bendix Brake Boosters -> POWER BRAKE UNIT, Replace -> 1990-91 C & K SERIES -> ASTRO VAN & SAFARI VAN -> CABALLERO & EL CAMINO -> FULL SIZE EXCEPT 1990-91 C & K SERIES
Vehicle: 1991 GMC K1500 Pickup Sierra 4.3 V6 GAS

CABALLERO & EL CAMINO

Pump brake pedal several times with engine off to deplete accumulator of fluid.

  • Remove two nuts attaching master cylinder to booster, then move master cylinder away from booster with brake lines attached.
  • Remove three hydraulic lines from booster. Plug and cap all lines and outlets.
  • Remove retainer and washer securing booster pushrod to brake pedal arm.
  • Remove four nuts attaching booster unit to dash panel.
  • From engine compartment, loosen booster from dash panel and move booster pushrod inboard until it disconnects from brake pedal arm. Remove spring wa...

CLICK HERE TO GET FULL ACCESS TO 1991 GMC K1500 Pickup BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1991 GMC K1500 Pickup AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 GMC K1500 Pickup cars and light trucks from 1990+.

ANTI-LOCK BRAKES, GENERAL MOTORS -> Four Wheel Anti-Lock Brake System -> COMPONENT REPLACEMENT -> EHCU MODULE -> FRONT WHEEL SPEED SENSOR -> REAR WHEEL SPEED SENSOR
Vehicle: 1991 GMC K1500 Pickup Sierra 5.0 V8 GAS

EHCU MODULE

The EHCU module is not serviceable and must be replaced as a unit. Refer to Fig. when replacing the unit.

  • Bleed brake booster by depressing brake pedal several times.
  • Remove washer tank attaching bolts, then position aside.
  • Remove EHCU electrical connectors.
  • Disconnect module brake lines. Use caution not to get brake fluid on paint or electrical connections.
  • Remove upper to lower bracket assembly attaching bolts.
  • Remove EHCU module and upper bracket assembly from vehicle.
  • Remove upper mounting bracket to EHCU module attaching bolts.
  • Reverse procedure to install, noting...

CLICK HERE TO GET FULL ACCESS TO 1991 GMC K1500 Pickup BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1991 GMC K1500 Pickup AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 GMC K1500 Pickup cars and light trucks from 1990+.

DISC BRAKES, GENERAL MOTORS -> General Information -> TROUBLESHOOTING -> BRAKE RATTLE -> BRAKE ROUGHNESS OR CHATTER; PEDAL PUMPING -> CALIPER BRAKE FLUID LEAK -> EXCESSIVE PEDAL EFFORT -> EXCESSIVE PEDAL TRAVEL -> HEAVY BRAKE DRAG -> NO BRAKING EFFECT WHEN BRAKE PEDAL IS DEPRESSED -> PULL, UNEVEN OR GRABBING BRAKES -> REAR BRAKES LOCKING ON APPLICATION
Vehicle: 1991 GMC K1500 Pickup Sierra 4.3 V6 GAS

EXCESSIVE PEDAL TRAVEL

  • Worn brake linings.
  • Disc pads knock back after cornering or rough road travel.
  • Piston and linings not properly seated or positioned.
  • Insufficient fluid in system.
  • Loose wheel bearing adjustment.
  • Damaged or worn caliper piston seal.
  • Improper booster pushrod adjustment.
  • Pads out of flat more than .005 inch.
  • Rear brake automatic adjusters inoperative.
  • Improperly ground rear brake shoes.

BRAKE ROUGHNESS OR CHATTER; PEDAL PUMPING

  • Excessive lateral runout of rotor.
  • Rotor excessively out of parallel.

EXCESSIVE PEDAL EFFORT

  • Frozen or seized pistons.
  • Brake fluid, oil or grease on ...

CLICK HERE TO GET FULL ACCESS TO 1991 GMC K1500 Pickup BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1991 GMC K1500 Pickup AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 GMC K1500 Pickup cars and light trucks from 1990+.

ANTI-LOCK BRAKES, GENERAL MOTORS -> Four Wheel Anti-Lock Brake System -> DIAGNOSIS & TESTING -> CLEARING CODES -> DIAGNOSTIC CIRCUIT CHECK -> DIAGNOSTIC TESTS -> READING CODES -> WIRING DIAGRAMS
Vehicle: 1991 GMC K1500 Pickup Sierra XC 5.0 V8 GAS

WIRING DIAGRAMS

Refer to "Wiring Diagrams" in "Vehicle Systems."

DIAGNOSTIC CIRCUIT CHECK

Refer to Figs. and for diagnostic circuit checks.

READING CODES

Trouble codes may be read with the TECH 1 scanner or by jumping terminal "H " of the ALDL to terminal "A" of the ALDL while observing the flashing of the "Anti-Lock" warning lamp. The terminals must be jumped for a few seconds before the code will begin.""

DIAGNOSTIC TESTS

[[table data]]

CLEARING CODES

If the "Anti-Lock" warning lamp stays lit, the codes may be cleared with the TECH 1 scanner or by the following procedu...

CLICK HERE TO GET FULL ACCESS TO 1991 GMC K1500 Pickup BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1991 GMC K1500 Pickup AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 GMC K1500 Pickup cars and light trucks from 1990+.

DRUM BRAKES, GENERAL MOTORS -> Drum Brake Service -> Installation -> 1990-91 C & K SERIES w/NON-SERVO BRAKES -> EXCEPT TRACKER, 1990-91 C & K SERIES w/NON-SERVO BRAKES -> TRACKER
Vehicle: 1991 GMC K1500 Pickup Sierra 4.3 V6 GAS

EXCEPT TRACKER, 1990-91 C & K SERIES w/NON-SERVO BRAKES

  • Lubricate parking brake lever fulcrum with suitable brake lube, then attach lever to brake shoe. Ensure lever operates smoothly.
  • Connect brake shoes with adjusting screw spring, then position adjusting screw. Ensure adjusting screw star wheel does not contact adjusting screw spring after installation, and also ensure RH thread adjusting screw is installed on left side of vehicle and LH thread adjusting screw is installed on right side of vehicle. When brake shoe installation is completed, ensure star wheel lines up with adjustin...

CLICK HERE TO GET FULL ACCESS TO 1991 GMC K1500 Pickup BRAKE SERVICE PROCEDURES

Shop online for auto body parts, engines, wheels, lights...

Click here to view more details about 2005 GMC Yukon Parking Light, Passenger Side2005 GMC Yukon Parking Light, Passenger Side, Bulbs not included; DOT and SAE approved; A high quality, OE replacement parking light; Backed by 1-year, unlimited-mileage warranty..

Source: Auto Body Parts Store

$51.53

Click here to view more details about 1999 GMC K2500 Suburban Window Regulator, Front, Driver Side1999 GMC K2500 Suburban Window Regulator, Front, Driver Side, Manufactured from 100 percent new components for reliable and long lasting performance; Features OE-comparable structural configuration, connectors, and drive gears that are designed for improved and longer service life..

Source: Auto Body Parts Store

$52.46

Click here to view more details about 2013 GMC Pickup Sierra Aftermarket Trim Ring2013 GMC Pickup Sierra Aftermarket Trim Ring, Aftermarket Trim Ring; 17 Inch; ABS, , .

Source: Wheels / Rims, Mirrors & Lights Store

$41.50

Click here to view more details1993 GMC K1500 Pickup Sierra XC V8, 6.2 L, 379 CID Rebuilt Engine, Diesel, non turbo, one piece rear main seal., Warranty: 3-Year/100,000 Mile, .

Source: Rebuilt Engines Store

$2,800.00

Click here to view more details1990 GMC K1500 Pickup Used Parking Lamp, Passenger Side, SIDE MARKER; (I-BEAM FRONT AXLE ONLY), (GRILLE MOUNTED), SEALED BEAM HEADLAMPS, R., Very Good.

Source: Used Auto Parts Store

$24.00

Click here to view more details1996 GMC K1500 Pickup Used Turbo, 6.5, AUTO, 4X2, 131K (8-395, 6.5L TURBODIESEL), Very Good.

Source: Used Auto Parts Store

$371.00
More parts
Help me findSearch
Auto Repair Quick Search
Help me find
Search DIY repair manuals by VIN...
Vehicle Identification Number is a unique serial number used by the automotive industry to identify individual motor vehicles

Find out what info we have for your vehicle

Get the Complete Technical Service Bulletins!
Get the Complete Technical Service Bulletins!Access diagrams and repair information such as wiring diagrams, diagnosis and repair charts, manufacturer service bulletins, and OEM Part numbers of your 1991 GMC K1500 Pickup vehicle.
Access the Complete guide!
Need To Fix Your Car or Truck?
Save Money With Free Car Insurance Quote
FREE car insurance quote
Enter Zip Code:
Auto Repair Quick Search
Help me find