How to change a fuse junction block under the hood on a 2007 chevy avalanche?

SOURCE: 4 Wheel drive not functional

There is a TSB on this problem: TSB #03-04-21-001C

Subject:4WD Switch Indicator Lights Flashing, 4WD Inoperative, DTCs C0327, P0500, P0836, P1875 Set (Replace Encoder Motor Sensor, Reprogram TCCM, Inspect Front Drive Axle Engagement Sleeve for Damage/Repair) #03-04-21-001D - (12/04/2003)



Models:2003 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003 GMC Sierra, Yukon, Yukon XL
with 4WD and Electric Shift or Active Transfer Case (RPO NP1 or NP8)
You can also try removing the TREC fuse (engine fuse box) and reinstall after 30 seconds. Look up the TSB number I gave you and you'll find alot more information.

SOURCE: 2002 chevy avalanche wont go into 4 wheel drive

the motor on ur transfer case is locked up .... if u don't use 4x4 once in a wile it will happen to all GM trucks

SOURCE: 2004 Avalanche "Service Air Bag

First, please review this article: Where's The Fuse?

I seriously doubt that your problem is being caused by a fuse. Your Passive Restraint System has a problem. This could be caused by a driver's airbag, a passenger airbag, a seat belt pre-tensioner, a contact assembly in the steering column, or any of the crash sensors. To find out what the problem is, you must scan your Passive Restraint (or Airbag) module to retrieve fault codes. The only thing I can tell you for sure without properly diagnosing your vehicle is that your airbag system will not function in the event of a crash. The system is designed to disable itself any time the warning light is illuminated. This is to prevent accidental deployment of the airbags due to a malfunction in the system.

SOURCE: battery went dead changed it

Hook the battery up or try to jump-start backwards did we?
The ECU fuse gets it's power from the 140 Amp (or 180 Amp, depending on which engine your vehicle is equipped with) ALTERNATOR fuse in the engine compartment fuse block.

twormed

• 131 Answers
• Posted on Aug 22, 2012

SOURCE: My 2007 Chevy Tahoe has service 4 wheel drive on dash and a check engin light is on and remote start will not work. Had the check engin light checked and it said transfer case control module has lost

a bad module will do this try unplugging it and plugging it back in, find a scanner that will talk to the 4x4 module not just the PCM.