I have a 2004 Chevy Tahoe. The problem is when we lock the doors with the clicker or door switch the drivers side and pass side doors lock but the rear two doors do not. I tried replacing the lock relay and it worked until I started the suv.. After we started it it went back to not working anymore Any Suggestions would help.
Doesn't lock or unlock ? These relay's are controlled by the BCM - body control module .
I have factory service repair information , 32 steps ! Too much info to post here .
Power Door Locks Inoperative (Rear Door(s))
2
Activate the door lock switches to the lock and unlock positions.
Do both rear passenger doors lock and unlock?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
3
Is there only one door lock actuator that is inoperative?
YES - Go to Step 6
NO - Go to Step 4
4
Are the rear door lock actuators inoperative for both lock and unlock?
YES - Go to Step 8
NO - Go to Step 5
5
Do the rear door lock actuators lock?
YES - Go to Step 15
No - Go to Step 10
6
Disconnect the inoperative door lock actuator.
With a test lamp connected to a good ground, probe the door lock actuator lock circuit at the door lock actuator harness connector.
Activate a door lock switch to lock position.
Does the test lamp illuminate?
YES - Go to Step 7
NO - Go to Step 25
Some of these steps can be bypassed because you say they worked after replacing the relay .LOCK RELAY ? right .
7
With a test lamp connected to a good ground, probe the door lock actuator unlock circuit at the door lock actuator harness connector.
Activate a door lock switch to unlock position.
Does the test lamp illuminate?
YES - Go to Step 24
NO - Go to Step 26
8
Remove the rear door unlock relay.
Connect a test lamp to battery positive voltage.
Probe the door actuator unlock control circuit cavity in the left IP fuse block.
Does the test lamp illuminate?
YES - Go to Step 21
NO - Go to Step 9
9
Install the rear door unlock relay.
Remove the rear door lock relay.
Connect a test lamp to battery positive voltage.
Probe the door lock actuator lock control circuit cavity in the fuse block.
Does the test lamp illuminate?
YES - Go to Step 20
NO - Go to Step 22
10
Remove the rear door lock relay.
Connect a test lamp to a good ground.
Probe the battery positive voltage circuit (high current) cavity in the fuse block.
Does the test lamp illuminate?
YES - Go to Step 11
NO - Go to Step 22
If your not familiar with GM diagnostic flow chart's , they can be confusing .
Let me know if you need more diagnostic steps .
SOURCE: 2004 Chevy Tahoe stereo wiring diagram
BLACK-ground
RED-accessorie
YELLOW-power 12v
PURPLE-left rear
GREEN-right rear
WHITE-left front
GREY-right front
BLUE-REMOTE
and the other blue one is for remote antenna..
SOURCE: 2003 chevy tahoe front rear end fluid
i think what you are talking about is the front differential. you will wanna put gear oil in it. the correct weight would be found in your manual.
SOURCE: fuel gauge bouncing on 2000 chevy tahoe where is fuel pump relay
fuel sending unit is in the tank. this is normal after about 75k miles and up. pump and sending unit are sold together. fuel sloshes from front to rear making the float on the sender rise and fall.
SOURCE: power door locks on a 2004 chevy tahoe don't work
The door locks on my 1999 tahoe stopped working and I checked the fuse, which was fine. The problem turned out to be that the fuse for my cigarette lighter was bad and for some reason it also must be working in order for the door locks to work. Put in a new cigarette lighter fuse and the door locks worked again!
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