Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 231 (ENGINE CONTROLS - REMOVAL & INSTALLATION)AIR INDUCTION SYSTEMSAIR CLEANER ASSEMBLYREMOVAL & INSTALLATION
1999 GMC Forward Control 5.7 R, Automatic
Removal & Installation
1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal & Installation
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Prior to disconnecting negative battery cable, record all of the customer's radio station presets, turn off all the lamps and accessories and turn the ignition OFF. After job has been completed, install the battery ground (negative) cable and bolt to the battery. Tighten the battery terminal bolt to specification. Program all of the customer's radio station presets and set the radio clock to the current time.
- Disconnect the negative battery cable. Reposition the reservoir hose clamp at the radiator overflow fitting using Hose Clamp Pliers (J 38185). Remove the reservoir hose at the radiator overflow fitting. Remove the reservoir mounting clip. Remove the coolant reservoir.
- Rotate the cruise control cable counter clockwise at the module in order to remove the cable from the module. See Fig 1 . Remove the cable from the module band. Disconnect the electrical connector from the cruise control module. Remove the cruise control module from the bracket.
- Remove the engine coolant heater harness from the left front fender diagonal brace, if equipped. Remove the front end sheet metal diagonal brace to the inner fender bolt. See Fig 2 . Remove the front end sheet metal diagonal brace to radiator support bolts. Remove the front end sheet metal diagonal brace.
- Remove the air cleaner intake duct. See AIR CLEANER INTAKE DUCT . Unsnap the latch on the upper cover and remove the cover. See Fig 3 . Carefully remove the Powertrain Control Module (PCM) leaving the 2 harnesses connected and set aside. Remove the 2 bolts from the air cleaner assembly and remove the housing. See Fig 4 .
- To install, reverse removal procedure. Tighten the air cleaner housing bolts to specification. See TORQUE SPECIFICATIONS . Tighten the air cleaner intake duct clamps to specification.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.