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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1994 GMC Yukon car and truck
repair procedures including GMC engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
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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 1994 GMC Yukon automobile. Try the Automotix DIY solution today!
We have info for following modifications of 1994 GMC Yukon
- 1994 GMC Yukon 5.7 V8 GAS, CID:350, Fuel Injection, Aspiration:350, Engine VIN:, Desg:K
- 1994 GMC Yukon 6.5 V8 DIESEL, CID:395, Fuel Injection, Aspiration:395, Engine VIN:, Desg:S
BRAKE SERVICE PROCEDURES FOR 1994 GMC Yukon AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1994 GMC Yukon cars and light trucks from 1990+.
Anti-lock Brakes -> Four Wheel Anti-Lock Brake System -> System Service -> 1992-95 -> 1996 -> Astro & Safari -> Brake Pressure Modulator Valve (BPMV) -> Brake System Bleed -> C & K Series -> Combination Valve -> Component Replacement -> Electro-Hydraulic Control Unit (EHCU)/Brake Pressure Modulator Valve (BPMV) Module -> Electro-Hydraulic Control Unit Brake Pressure Modulator Valve (EHCU/BPMV) Module -> Electronic Brake Control Module (EBCM) -> Except S & T Series w/VCM & VCM-A -> Front Wheel Speed Sensor -> Pressure Bleed -> Rear Wheel Speed Sensor -> S & T Series -> S & T Series w/VCM & VCM-A -> Two-Person (Manual) Bleed
Vehicle: 1994 GMC Yukon 6.5 V8 DIESEL
Brake System Bleed
1992-95
Electro-Hydraulic Control Unit Brake Pressure Modulator Valve (EHCU/BPMV) Module
The EHCU/BPMV Module should be bled after replacement or if air is trapped in the unit. If bleeding is required, the module must be bled thoroughly before the wheel cylinders and calipers.
There are two bleeders on top of the unit that appear to be normal bleeders, Fig. . These are modulator bleeders and must remain closed when the unit is not pressurized.
The internal bleeders are on either side of EHCU/BPMV module. The valves are used to open the internal passages within the E...
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BRAKE SERVICE PROCEDURES FOR 1994 GMC Yukon AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1994 GMC Yukon cars and light trucks from 1990+.
Anti-lock Brakes -> Rear Wheel Anti-Lock Brake System -> Diagnosis & Testing -> 1992 -> 1993 S & T SERIES -> 1993-94 C & K SERIES & 1994 S & T SERIES -> 1993-95 -> 1995 S & T SERIES -> Accessing Diagnostic Trouble Codes -> C & K Series -> Clearing Diagnostic Trouble Codes -> Diagnostic Trouble Code Interpretation -> RWAL System -> S & T Series -> ZPRWAL System
Vehicle: 1994 GMC Yukon 5.7 V8 GAS
Accessing Diagnostic Trouble Codes
1992
Diagnostic trouble codes can be accessed by connecting a TECH 1 or equivalent scan tool or by manually grounding the Assembly Line Diagnostic Link (ALDL) connector. To manually ground the ALDL connector, connect a jumper wire between terminals A and H, Fig. , and observe the flashes of the brake warning lamp. Note the following when performing the Diagnostic Circuit Check to access diagnostic trouble codes:
- When terminals are jumped, count number of short flashes starting from initial long flash, include long flash in count.
- The count se...
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BRAKE SERVICE PROCEDURES FOR 1994 GMC Yukon AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1994 GMC Yukon cars and light trucks from 1990+.
Power Brake Units -> Delco-Moraine Brake Boosters -> Troubleshooting -> Brakes Grab -> Hard Pedal -> Slow Or No Release
Vehicle: 1994 GMC Yukon 6.5 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 1994 GMC Yukon BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1994 GMC Yukon AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1994 GMC Yukon cars and light trucks from 1990+.
Anti-lock Brakes -> Four Wheel Anti-Lock Brake System -> Description -> Except S & T Series w/VCM & VCM-A -> S & T Series w/VCM & VCM-A
Vehicle: 1994 GMC Yukon 6.5 V8 DIESEL
Except S & T Series w/VCM & VCM-A
This braking system, Figs. through , is designed to reduce the occurrence of wheel lock-up during severe braking conditions. To accomplish this function, the system regulates hydraulic brake line pressure by using an Electro-Hydraulic Control Unit (EHCU) module or a Brake Pressure Modulator Valve (BPMV). The EHCU/BPMV module has two types of valves: isolation valves, which maintain separate pressure for each front wheel and combine pressure for the rear wheels, and dump valves, which "dump" pressure to each front wheel separately and rear wheels comb...
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BRAKE SERVICE PROCEDURES FOR 1994 GMC Yukon AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1994 GMC Yukon cars and light trucks from 1990+.
Disc Brakes -> Delco-Moraine Single Piston Caliper -> Brake System Bleed -> C/K, G & M/L Series -> C/K, G, M/L, P & S/T Series -> Lumina APV, Silhouette & Trans Sport -> Manual Bleeding -> P Series -> Pressure Bleeding -> S/T Series -> Tracker
Vehicle: 1994 GMC Yukon 5.7 V8 GAS
The braking system can be bled manually or with pressure bleeding equipment. If bleeding manually, check fluid level frequently.
Brake fluid should never be reused. Before driving the vehicle, check brake operation to ensure a firm pedal has been obtained.
Brake fluid will damage electrical connections and painted surfaces. Use shop cloths, suitable containers, and fender covers to prevent brake fluid from contacting these areas. Always seal and wipe off brake fluid containers to prevent spills.
Manual Bleeding
C/K, G, M/L, P & S/T Series
- If vehicle is equipped with a vacuum or hy...
CLICK HERE TO GET FULL ACCESS TO 1994 GMC Yukon BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1994 GMC Yukon AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1994 GMC Yukon cars and light trucks from 1990+.
Power Brake Units -> Bendix Brake Boosters -> Power Brake Unit Service -> Accumulator Service -> Assemble -> Bleeding Booster -> Cleaning & Inspection -> Disassemble
Vehicle: 1994 GMC Yukon 6.5 V8 DIESEL
Disassemble
- Place accumulator compressor tool No. J-26889 or equivalent, around end of accumulator.
- Install nut onto stud as shown in Fig. , then depress the accumulator with a C-clamp.
- Remove retainer by using a punch.
- Release C-clamp and remove accumulator compressor tool.
- Remove accumulator, O-ring, retainer, plug and spring, Fig. .
- Remove retainer, output pushrod, baffle, piston return spring and retainer.
- Using a suitable saw, cut off eyelet of pedal rod, then remove the boot.
- Remove nut, bracket and bolts, then separate cover from housing.
- Remove piston assembly and seals...
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