Diverter not working, no heat to floor 2000 Jimmy

Ron

• 249 Answers
• Posted on Jul 28, 2010

SOURCE: vent selection not working After the transmission was rebuilt

They are controlled by vacuum ... a line must have been disconnected or broken when the trans was replaced. Remove the dog house and look for a small vacuum line broken or pulled apart.

Testimonial: "thanks i thought maybe this is what happened"

SOURCE: When turned to defrost, no

I had the same thing happen on my 2000 Sonoma, last week. I quickly found it to be a broken vacuum line. Look between the brake master cylinder and the drivers side fender- up top. Easy to find, there are 3 vacuum lines connected to a tee. One goes towards/ and into the fender itself. On my truck this line was cut due to rubbing on the fender opening. Withthe engine running it was drawing a good deal of air. I put a screw (plug) in the open line and my vent controls now work. Unfortunately I cannot find a vacuum diagram to tell me where the line into the fender ends up.

Mike Butler

• 6674 Answers
• Posted on Jan 25, 2009

SOURCE: i have a gmc 2500 4x4 and rear brakes locking up

Do you have a/the proportioning valve in your system? Pin needs to be pulled out for centering while bleeding.

SOURCE: I have an 89 GMC K-2500 SLX,the air diverter for

sounds like the acuator that controls the blend door has gone out. but if you acn get access to both try them manually first before replacing them

SOURCE: My 05 sierra 2500 6.6l

check for a loose vacuum line behind the glove box.