2008 gmc sierra drl module location - 2008 GMC Sierra 2500HD 2WD

SOURCE: gmc sierra 2008 low tire pressure problem

You can follow this to reset it.
Ignition ON, initiate the TPM Learn Mode
using one of the following procedures:

1. On vehicles equipped with keyless entry, simultaneously press the keyless entry transmitters lock and unlock buttons until a double horn chirp sounds indicating the Learn Mode has been enabled. The left front turn signal will also be illuminated.
   
2. On vehicles not equipped with keyless entry, press and release the driver information center (DIC) INFO button until the TIRE LEARN message appears on the DIC display. Press and hold the SET/RESET button until a double horn chirp sounds indicating the Learn Mode has been enabled. The left front turn signal will also be illuminated.
3. Increase/decrease the tire pressure for 8-10 seconds then wait for a horn chirp. The horn chirp may occur before or up to 30 seconds after the 8-10 second pressure increase/decrease time period has been reached. Once the horn chirp has sounded, the sensor information is learned and the turn signal in the next location to be learned will illuminate.
   After the horn chirp has sounded and the right front turn signal is illuminated, repeat step 2 for the remaining 3 sensors in the following order:
   3.1. Right front
   
   3.2. Right rear
   
   3.3. Left rear
   
   When the left rear sensor has been learned and a double horn chirp has sounded, the learn process is complete and the RCDLR exits the learn mode.
   Ignition OFF, adjust all tires to the recommended pressures

SOURCE: fuel pump fuse located on 1997 gmc sierra

The fuse is actually a Relay Switch and its located in the Fuse Relay Center on the driverside of the engine compartment. The Black Box is labled Fuse Relay Center, the diagram on the cap displays which Relay is the Fuel Pump relay...the Relay switch is usually $8-$15 depending on where you shop

SOURCE: replace neutral safety switch on a 1988 gmc sierra

Typically the Neutral Safety Switches are located with the gear selector, either in the column or the floor.

Hope this helps,
Tom

SOURCE: DRL is not working

1996-99 GM trucks.There is a diode, located under the dash between the steering wheel and the radio, fastened to the round dash bar. The bolt that holds it on, threads into the top of the bar, it is near impossible to get at with a wrench. It is a finned block of (usaully black) aluminum about 2 inches squared 3 inches long. I found a easy way to get it out. Looking up you will see two tabs bent holding the diode in a bracket, bend them out of the way( you may have to bend the bracket a little aswell) and with patience the diode will slide out of the bracket, then disconect the electrical plug-in. I have found that this is the main reason for day-time driving light failure

Also, check your emergency brake pedal. Make sure it is all the way up. If it is down just one click the day time running lamps will not come on.

SOURCE: Does 2004 GMC Sierra have a PVC Value?

The pcv is on the drivers side valve cover. It's an orifice type system and only needs to be checked for blockage which usually don't happen. If you can see through it don't replace it.