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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1990 GMC Jimmy 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 1990 GMC Jimmy automobile. Try the Automotix DIY solution today!
We have info for following modifications of 1990 GMC Jimmy
- 1990 GMC Jimmy 6.2 V8 DIESEL, CID:379, Fuel Injection, Aspiration:379, Engine VIN:, Desg:C
- 1990 GMC Jimmy 5.7 V8 GAS, CID:350, Fuel Injection, Aspiration:350, Engine VIN:, Desg:K
BRAKE SERVICE PROCEDURES FOR 1990 GMC Jimmy AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GMC Jimmy cars and light trucks from 1990+.
POWER BRAKE UNITS, GENERAL MOTORS -> General Service -> CHECKING COMPLAINTS
Vehicle: 1990 GMC Jimmy 6.2 V8 DIESEL
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, ...
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BRAKE SERVICE PROCEDURES FOR 1990 GMC Jimmy AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GMC Jimmy cars and light trucks from 1990+.
DISC BRAKES, GENERAL MOTORS -> Delco-Moraine Single Piston Caliper -> CALIPER SERVICE -> ASSEMBLE -> DISASSEMBLE -> INSTALLATION -> REMOVAL
Vehicle: 1990 GMC Jimmy 5.7 V8 GAS
REMOVAL
- Siphon enough brake fluid out of the master cylinder to bring fluid level to1-3 full to avoid fluid overflow when the caliper piston is pushed back into its bore.
- Raise and support vehicle, remove front wheels.
- Using a C-clamp, as illustrated in Fig. , push piston back into its bore.
- Remove two mounting bolts and lift caliper away from disc.
DISASSEMBLE
- Disconnect hose from the caliper being careful not to lose copper washers.
- Remove caliper as outlined above.
- Drain brake fluid from caliper.
- Pad caliper interior with clean shop towels and apply compressed air to remove piston, Fi...
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BRAKE SERVICE PROCEDURES FOR 1990 GMC Jimmy AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GMC Jimmy 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: 1990 GMC Jimmy 5.7 V8 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...
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BRAKE SERVICE PROCEDURES FOR 1990 GMC Jimmy AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GMC Jimmy cars and light trucks from 1990+.
ANTI-LOCK BRAKES, GENERAL MOTORS -> Four Wheel Anti-Lock Brake System -> TROUBLESHOOTING
Vehicle: 1990 GMC Jimmy 5.7 V8 GAS
Refer to Figs. throug...
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BRAKE SERVICE PROCEDURES FOR 1990 GMC Jimmy AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GMC Jimmy cars and light trucks from 1990+.
DISC BRAKES, GENERAL MOTORS -> General Information -> SERVICE PRECAUTIONS -> BLEEDING DISC BRAKES -> BRAKE DISC SERVICE -> BRAKE LINES & LININGS -> BRAKE ROUGHNESS -> GENERAL PRECAUTIONS -> INSPECTION OF CALIPER
Vehicle: 1990 GMC Jimmy 5.7 V8 GAS
BRAKE LINES & LININGS
Remove one of the front wheels and inspect the brake disc, caliper and linings.
Do not get any oil or grease on the linings. It is recommended that all linings be replaced in sets when worn or damaged.
If the caliper is cracked or fluid leakage through the casting is evident, it must be replaced as a unit.
BRAKE ROUGHNESS
The most common cause of brake chatter on disc brakes is a variation in thickness of the disc. If roughness or vibration is encountered during highway operation or if pedal pumping is experienced at low speeds, the disc may have excessive t...
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BRAKE SERVICE PROCEDURES FOR 1990 GMC Jimmy AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GMC Jimmy cars and light trucks from 1990+.
DRUM BRAKES, GENERAL MOTORS -> Drum Brake Service -> Adjustments -> 1990-91 CHEVROLET & GMC C & K SERIES -> AUTOMATIC APPLY PARKING BRAKES -> CABALLERO & EL CAMINO -> CHEVROLET & GMC FULL SIZE TRUCKS & VANS EXCEPT 1990-91 C & K SERIES -> CHEVROLET ASTRO VAN & GMC SAFARI VAN -> CHEVROLET S/T 10 & GMC S/T 15, OLDSMOBILE BRAVADA -> CONTROL ROD, ADJUST -> Duo-Servo Brakes -> Lever Type -> LUMINA (APV), SILHOUETTE & TRANS SPORT -> MANUAL PARKING BRAKES -> Non-Servo Brakes -> Pedal Type -> Propeller Shaft Type -> SERIES 10-30/1500-3500 -> SERVICE BRAKES -> TRACKER
Vehicle: 1990 GMC Jimmy 6.2 V8 DIESEL
SERVICE BRAKES
These brakes have self-adjusting shoe mechanisms that assure correct lining-to-drum clearances at all times. The automatic adjusters operate only when the brakes are applied as the vehicle is moving rearward or when the car comes to an uphill stop.
Although the brakes are self-adjusting, an initial adjustment is necessary after the brake shoes have been relined or replaced, or when the length of the adjusting screw has been changed during some other service operation. Refer to "Installation" for this procedure.
Frequent usage of an automatic transmission forward range to h...
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