SOURCE: chevy avalanche transmission problems
Hello;
Are you getting the check engine light? If so the electronics may have gone out. You may not need a rebuild but you won't know till you pull the oil pan on the transmission and inspect the contents. You may also have lost the neutral safety switch. It is mounted on the drivers side of the transmission. Check those out first and let me know what codes you get.
For Ponchoboy; the clunking and hissing you hear are teminal root causes. Drop the oil pan and if it has a lot of filings and metal it is time for a rebuild.
Hope this helps; Rate me highly;
Rich
RPM Northwest
SOURCE: I need to remove the door panel on my 2004 Avalanche
There are plastic clips that hold the door panel inplace .. First look for any hidden screws near the door handle . there might be a little plastic cover that you need to remove with a small screw driver to find the screws.. look under the handle also to see if there are any hidden screws . next take a flat blade screw driver and start at the bottom corner and try gently prying the door panel off . try to stay close to the plastic clips not to damage them by prying real hard .. once you have snapped them loose all the way around .. lift up on the door panel to remove it from around the window lip and out it should come.. holler if you have any problems.. usually The mirrors on the chevys are up above the panel and there is a triangle plastic cover over it on the inside .. it will pry off also gently and there are 3 nuts there that need to be removed .. use caution these fall behind the door panel ... holler if you need more. Jerry
SOURCE: ned to know where the blend door actuator for the
i think it is on the air distribution box and alot of times you have to take it out to take the actuator off which requires removal of the dash
SOURCE: 2003 CHEVY AVALANCHE dash board telling me left
check the lil switch that'll be located on the latch anchor point or within a few inches of it.... odd is the switch is faulty
SOURCE: Replace Blend door on 2004 Suburban
My problem is hot air on the drivers side, cold on Pass when the AC is on...2004 Sub
Fig. Remove the floor air outlet duct extension (1) from the floor duct (2)
Disconnect the electrical connection at the blend door actuator (#10 in pic below). 
Fig. Blend door actuator and related components
Remove the blend door actuator mounting screws from the HVAC module.
Remove the blend door actuator as an assembly with the actuator cam. 
Fig. Remove the blend door actuator mounting screws from the HVAC module
To install:
Picture of actuator:
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