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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 -> Bendix Brake Boosters -> HYDRO-BOOST II -> BLEEDING BOOSTER -> CLEANING & INSPECTION -> DESCRIPTION -> DISASSEMBLE & ASSEMBLE
Vehicle: 1991 GMC K1500 Pickup Sierra XC 5.0 V8 GAS

DESCRIPTION

Hydro-Boost II is an hydraulically operated power brake booster. The hydraulic brake booster consists of an open center spool valve and an hydraulic cylinder combined into a single housing. The power steering pump provides the hydraulic fluid pressure to operate both the power brake booster and the power steering gear.

A dual master cylinder is bolted to the brake booster and is operated by a pushrod projecting from the booster cylinder bore.

The Hydro-Boost II also has an accumulator system which stores sufficient fluid under pressure to provide one power assisted brake...

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+.

HYDRAULIC BRAKE SYSTEMS, GENERAL MOTORS -> MASTER CYLINDER SERVICE -> Assemble -> BENDIX TYPE -> CAST IRON TYPE -> COMPOSITE TYPE -> DELCO MORAINE TYPE -> Disassemble -> Inspection -> TRACKER MODELS
Vehicle: 1991 GMC K1500 Pickup Sierra XC 5.7 V8 GAS

DELCO MORAINE TYPE

COMPOSITE TYPE

Refer to Figs. and when performing the following procedures.

Disassemble
  • Remove master cylinder from vehicle.
  • Remove reservoir cover and diaphragm. Discard old brake fluid in reservoir.
  • Inspect cover and diaphragm. Replace if cut, cracked or deformed.
  • Remove fluid level switch and proportioner valve assembly, if equipped.
  • Depress primary piston and remove lock ring.
  • Plug primary fluid outlet (outlet nearest to cowl when master cylinder is installed), then apply compressed air into secondary fluid outlet to remove primary and secondary pistons.
  • R...

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 -> Delco-Moraine Brake Boosters -> TROUBLESHOOTING -> BRAKES GRAB -> HARD PEDAL -> SLOW OR NO RELEASE
Vehicle: 1991 GMC K1500 Pickup Sierra XC 5.7 V8 GAS

HARD PEDAL

  • Internal vacuum leak.
  • Faulty control valve.
  • Broken or damaged hydraulic brake lines.
  • Collapsed or damaged vacuum hose.
  • Plugged or loose vacuum fitting.
  • Bad stud welds on front or rear housing on power head.
  • Faulty booster diaphragm.
  • Restricted air filter element.
  • Worn or distorted reaction plate or levers.
  • Cracked or broken pow...

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 -> Delco-Moraine Brake Boosters -> TROUBLESHOOTING -> BRAKES GRAB -> HARD PEDAL -> SLOW OR NO RELEASE
Vehicle: 1991 GMC K1500 Pickup Sierra 6.2 V8 DIESEL

HARD PEDAL

  • Internal vacuum leak.
  • Faulty control valve.
  • Broken or damaged hydraulic brake lines.
  • Collapsed or damaged vacuum hose.
  • Plugged or loose vacuum fitting.
  • Bad stud welds on front or rear housing on power head.
  • Faulty booster diaphragm.
  • Restricted air filter element.
  • Worn or distorted reaction plate or levers.
  • Cracked or broken pow...

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 -> Removal -> 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

  • Raise and support vehicle, then remove tire and wheel assembly.
  • Remove brake drum. If brake lining is dragging on brake drum, back off brake adjustment by rotating adjustment screw. Refer to individual truck chapter for procedure. If brake drum is rusted or corroded to axle flange and cannot be removed, lightly tap flange to drum mounting surface with a suitable hammer.
  • Using brake spring pliers or equivalent, unhook primary and secondary return springs, Figs. through . Observe location of brake parts being removed to aid during ins...

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 -> General Service -> CHECKING COMPLAINTS
Vehicle: 1991 GMC K1500 Pickup Sierra XC 4.3 V6 GAS

Diagnose power brakes systems as if two separate systems exist. Check for faults in the regular brake system first. If no problem exists in the regular brake system, diagnosis the power brake circuit is necessary. For a quick check of proper power unit operation, press the brake pedal firmly and then start the engine. The pedal should fall away slightly and less pressure should be needed to maintain the pedal in any position. On vacuum suspended power units, air will rush into the air intake when the brakes are applied.

To perform another check, remove the stop light switch, ...

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 1999 GMC K1500 Tailgate Handle Bezel1999 GMC K1500 Tailgate Handle Bezel, A high quality, direct fit OE replacement tailgate handle bezel; Backed by 1-year, unlimited-mileage warranty..

Source: Auto Body Parts Store

$7.17

Click here to view more details about 1998 GMC K1500 Fender, Front, Driver Side1998 GMC K1500 Fender, Front, Driver Side.

Source: Auto Body Parts Store

$85.21

Click here to view more details2013 GMC Yukon Denali Tail Light Assembly, Passenger Side, PASSENGER SIDE TAIL LIGHT ASSEMBLY, CLEAR OUTER LENS FOR DENALI MODELS, INCLUDES WIRING HARNESS, , .

Source: Wheels / Rims, Mirrors & Lights Store

$57.45

Click here to view more details1998 GMC K1500 Pickup Sierra XC V8, 6.5 L, 395 CID Rebuilt Engine, Warranty: 3-Year/100,000 Mile, .

Source: Rebuilt Engines Store

$6,365.00

Click here to view more details1996 GMC K1500 Pickup Used Air Flow Meter/Sensor, 5.7, AUTO, 4X4, Very Good.

Source: Used Auto Parts Store

$77.00

Click here to view more details1996 GMC K1500 Pickup Used A/C Compressor, 4.3, AUTO, RWD, Very Good.

Source: Used Auto Parts Store

$145.00
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