Need to turn on headlights of 2004 gmc envoy slt while still in park

SOURCE: 2004 Envoy AC works but does not come out the front vents. Only @ windshield

You most likely have a bad mode actuator. http://forums.trailvoy.com/showthread.php?t=40235

SOURCE: 2002 gmc envoy slt 4x4

Had the same concern. Had to take mine to the dealership and have them replace the system. Be careful when you change between the drives. Vehicle MUST be in park, of course started, and you can change the drive. WAIT until the light completely stops blinking before placing into gear or trying to change to another setting. When you change the setting, a gear arm raises or lowers, and resets. Listen and you can hear it. Often when the vehicle has sat for a while, or if the battery has been disconnected, you will hear it resetting. If this does not work, you have to take it into the shop to have the gear sensor repalced.

Dan De Groote

• 35 Answers
• Posted on May 26, 2009

SOURCE: need fuse box diagram 2002 gmc envoy

If I remember correctly if you look at the back side of the fuse cover, it should tell you what the fuses are. Also in the owners manual in the index, under fuses, it should give you a diagram of the fuse location for the acc. outlets. Good luck. The fuse should be a 20 or 25A fuse.

SOURCE: The button on our 2004 GMC Envoy gear shift will not depress when

The brake rlease switch for the gearshift might need adjusted-replaced or the shifter itself might need adjusted

Duane Wong

• 6826 Answers
• Posted on Jul 08, 2010

SOURCE: HOW DO I CHANGE MY FUEL FILTER ON MY 2003 GMC

Fuel Filter Removal & Installation 2002-2004 To Remove:
NOTE: If a fuel filter is restricted, clean and inspect the inside of the fuel tank.

1. Relieve the pressure in the fuel system.
2. Lift the vehicle.
3. If necessary, remove the fuel tank shield from the frame.
4. Make sure the fuel pipe and hose connections, as well as the surrounding areas, are clean.
5. Disconnect the fuel pipes from the fuel filter; keep the retaining clips with the filter.
6. To avoid fuel loss and fuel system contamination, cap off the fuel pipes. Fuel filter removal and installation
   
   
7. Remove the screw from the fuel filter bracket.
8. Remove the fuel filter from the fuel filter bracket.

1. Install the fuel filter into the fuel filter bracket.
2. For vehicles with a 4.2L engine, install the screw into the fuel filter bracket. Torque the screw to 13 in-lb (1.5 Nm).
3. For vehicles with a 5.3L engine, install the screw into the fuel filter bracket. Torque the screw to 106 in-lb (12 Nm).
4. Uncap the fuel pipes.
5. Connect the fuel pipes to the fuel filter.
6. Turn on the ignition for 2 seconds, with the engine off, and then turn off the ignition. After 10 seconds, turn the ignition back on with the engine off.
7. Check for leaks in the fuel lines.
8. Lift the vehicle.
9. If previously removed, install the fuel tank shield to the frame.
10. Lower the vehicle.