GMC Sierra - Popular Questions, Answers, Tips & Manuals - Page 6

CIG LTR Fuse 15 amp located in the under hood fuse box. Plus AUX PWR 1 fuse 20amp also located in the underhood fuse box.

not sure if you are looking at the right thing...go to this site and check it out. http://www.autogenius.info/gmc-sierra-2009-2013-fuse-box-diagram/

Don't really know for a fact it's your problem friend, but to adjust the cable, which controls shift on this style trans, leave engine off, raise hood, open throttle completely by hand, stick your finger, or something of the sort, into the opening on top of the plastic cable connector and depress the button on top over top of the cable. This is a ratchet action cable adjustment, when depressed the cable will fly back into the housing. Then the cable is adjusted automatically by the transmission itself and you need do nothing more. It's just GMs way of getting something serviced so it doesn't get screwed up by the owner or shade tree mechanic. See if it shifts properly now. If not yet, drive it a bit and give it time to adjust to its new setting. With the 700R4 and 4R200, could be either in your vehicle, has a lower first gear and normally will shift right away into 2nd gear after moving a few feet. So it should go to 2nd gear without much time involved. You can't hold these tranny's in low either. They will still go into second while holding the shifter down in first. Just the nature of the beast. I thought it best you know these things. Now, this one thing may not ever happen, but IF ever it will not go into overdrive and will stay in 3rd gear no matter what you do, it means the trans must be rebuilt because the OD is shot. Possibly the drum scarred and burnt up inside on OD.

You may have a dead cell in the battery , or damp in the electrics.

There may be a short in the front socket. Remove the bulb and inspect the socket for damage. If corroded, clean it up or replace it.

Not sure about this vehicle, but most GM vehicles have the sensor installed under the hood in front of the radiator.

Remove the blend door motor and move the door by hand. Blend door motors are cheap. Why not just replace it?

Mostly there are no lights and no problems with bleeding abs brakes - the brake pedal has to be pumped full stroke after replacing brake pads or servicing the brakes and that doesn't usually cause problems though there are no absolute guarantees.

Is the parking brake engaged?

GM used four different engines that year. Which one do you have

Not true that GM dealer is the only one that can fix it . There are other independent repair shops that can, Transmission repair shops like AAMCO . You could too if you had access to a scan tool that can read DTC'S - diagnostic trouble codes for the 4X4 system . There is a 4X4 control module that can store DTC'S when problems happen . When a warning like check 4 Wheel Drive light's up ,it's not meant for you to do anything except take it to the dealer ,well ,that's what the dealer would like . Would need to know which 4X4 transfer case your's has ? Two speed manual , two speed selectable , two speed automatic ? Their are a few different one's Transfer Case - BW 4401 (Two Speed Manual) Transfer Case - BW 4470 (Two Speed Manual) Transfer Case - NVG 241-NP2 (Two Speed Manual) Transfer Case - NVG 243-NP1 (Two Speed Selectable) Transfer Case - NVG 246-NP8 (Two Speed Automatic) Two speed Automatic system can set a number of codes DTC B0768 Service Indicator Circuit High DTC B2725 ATC Mode Switch Circuit Malfunction DTC C0300 Rear Speed Sensor Malfunction DTC C0305 Front Speed Sensor Malfunction DTC C0308 Motor A/B Circuit Low DTC C0309 Motor A/B Circuit High DTC C0310 Motor A/B Circuit Open DTC C0315 Motor Ground Circuit Open DTC C0323 T-Case Lock Circuit Low DTC C0324 T-Case Lock Circuit High DTC C0327 Encoder Circuit Malfunction DTC C0357 Park Switch Circuit High DTC C0362 4LO Discrete Output Circuit High DTC C0367 Front Axle Control Circuit High DTC C0374 General System Malfunction DTC C0376 Front/Rear Shaft Speed Mismatch DTC C0387 Unable to Perform Shift DTC C0550 ECU Malfunction DTC C0611 VIN Information Error Without having this info you could go round an round an never find the problem .

Do you own a professional type scan tool that show's engine sensor data ? 048 Engine Hard to Start or No Start Scan Data for Starting Problems 003 Fuel System Tests Scan Data Tests

There are a numerous reasons for this problem..best bet is to have it serviced by a reputable indavidual

Are you located somewhere cold? some vehicles will not allow the evap to run its cycle under cold conditions, you shouldnt have to drive more than 180 miles, but you might have too. If you can take it to a heated garage and run it it might help

the part needs to be securely mounted for it to sense impact and deploy the air bags that can be achieved by mounting a bracket around it to hold it in place parts can be obtained from the wreckers / junk yards or generic units from e-bay or quality auto spares shops and while the dealer says that the part is no longer available for that model , it may just have a number change and fit a later model GM will not make the part but use a manufacturer item and place it in a GM box to inflate the price

Probably a faulty switch on the door post.

gmc sierra 1500 This link I have attached you can get access to complete guides online

Did you change the fuel presure regulator located in the throttle body?

You have a bad ground cable or strap. Check all body grounds.

Check u-joints on drive shaft.