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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!
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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+.

POWER BRAKE UNITS, GENERAL MOTORS -> Delco-Moraine Brake Boosters -> TANDEM DIAPHRAGM TYPE -> Assemble -> BOOSTER SERVICE -> DESCRIPTION -> Disassemble
Vehicle: 1991 GMC K1500 Pickup Sierra XC 5.7 V8 GAS

DESCRIPTION

These units, Figs. and , have a vacuum power chamber that consists of a front and rear shell, a housing divider, front and rear diaphragm and plate assemblies, an hydraulic pushrod and a diaphragm return spring.

The unit operates in much the same manner as the Single Diaphragm unit described above. The diaphragm and plate assemblies use the pressure differential created by engine intake manifold vacuum and atmospheric pressure to assist the hydraulic pushrod.

BOOSTER SERVICE

Disassemble
  • Remove boot, silencer, vacuum check valve, grommet and front housing seal Fig. ...

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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 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 -> HYDRO-BOOST -> ACCUMULATOR SERVICE -> ASSEMBLE -> BLEEDING BOOSTER -> CLEANING & INSPECTION -> DESCRIPTION -> DISASSEMBLE
Vehicle: 1991 GMC K1500 Pickup Sierra XC 5.7 V8 GAS

DESCRIPTION

The Hydro-Boost system, Fig. , provides an additional cylinder in the brake system. This cylinder contains no brake fluid. The Hydro-Boost cylinder is hydraulically operated, by pressurized fluid from the power steering pump, providing power assist to operate a dual master cylinder brake system.

The booster is composed of two sections; the linkage section and the power section.

The booster is designed so that if a total absence of power assist occurs, the brakes can be applied manually, but somewhat greater pressure on the brake pedal is required.

DISASSEMBLE

  • Place accumulato...

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 5.7 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...

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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 -> Delco-Moraine Single Piston Caliper -> DESCRIPTION
Vehicle: 1991 GMC K1500 Pickup Sierra XC 5.0 V8 GAS

The caliper assembly, Fig. , slides on its mounting surfaces. Upon brake application, hydraulic pressure against the piston forces the inboard pad against the inboar...

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 -> Tracker Brake Booster -> IN-VEHICLE SERVICE -> BOOSTER PISTON ROD ADJUSTMENT
Vehicle: 1991 GMC K1500 Pickup Sierra XC 4.3 V6 GAS

BOOSTER PISTON ROD ADJUSTMENT

  • Pump brake pedal several times, then remove master cylinder from brake booster.
  • With gasket installed on master cylinder, install booster piston rod gauge tool No. J34873-A or equivalent on master...

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

Click here to view more details about 2001 GMC Jimmy Grille Assembly2001 GMC Jimmy Grille Assembly, With emblem provision, chrome frame, and gray grille insert; A high quality, OE replacement complete grille and shell assembly; Backed by 1-year, unlimited-mileage warranty..

Source: Auto Body Parts Store

$32.66

Click here to view more details about 2005 GMC Yukon Door Handle, Front, Passenger Side2005 GMC Yukon Door Handle, Front, Passenger Side, With keyhole; A high quality, OE replacement door handle; Backed by 1-year, unlimited-mileage warranty..

Source: Auto Body Parts Store

$14.34

Click here to view more details about 2007 GMC Pickup Sierra Classic Taillight Set2007 GMC Pickup Sierra Classic Taillight Set, Carbon Fiber Tail Light Set [Set 0F 2], , .

Source: Wheels / Rims, Mirrors & Lights Store

$71.45

Click here to view more details1999 GMC K1500 Pickup V8, 5 L, 305 CID Rebuilt Engine, SFI, roller lifters, plastic timing cover, Warranty: 3-Year/100,000 Mile, .

Source: Rebuilt Engines Store

$1,640.00

Click here to view more details1988 GMC K1500 Pickup Used A/C Compressor, 5.7, MANUAL, 4X4, Very Good.

Source: Used Auto Parts Store

$159.00

Click here to view more details1998 GMC K1500 Pickup Used Exhaust Manifold, 8-350 (5.7L), W/AIR, R., Very Good.

Source: Used Auto Parts Store

$132.00
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