'99 Burb a/c diverter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Psycho71 · 10-20-2013, 01:07 PM

Just acquired a '99 burb (1500) SLE, having a small issue with the air diverter on the A/C. it will divert to the floor or defrost, but has a problem with diverting to the dash. Every now and then it will, but not often.

IIRC, these use a vacuum operated diverter. The engine has 160k miles, and and is in decent shape (so it seems). I'm thinking it should be making enough vacuum to activate the valve.

What say ye? Is this most likely a vacuum issue, or a diverter valve issue? Any advice before I find the lever and zip tie it into place?

**Boog** · 10-20-2013, 08:18 PM

The door actuators are electric these days, not vacumn. Here's a look behind the dash.

Psycho71 · 10-20-2013, 08:57 PM

Electric, OK. Does anyone know which is more prone to failure, the switch or the actuator?

Thanks for the pic, I was looking for it today, and it wasn't in the same place the one on my '98 pickup was.

10-20-2013, 01:07 PM	#1
Psycho71 Registered User Join Date: Jan 2006 Location: Kaufman, Tx Posts: 827	'99 Burb a/c diverter Just acquired a '99 burb (1500) SLE, having a small issue with the air diverter on the A/C. it will divert to the floor or defrost, but has a problem with diverting to the dash. Every now and then it will, but not often. IIRC, these use a vacuum operated diverter. The engine has 160k miles, and and is in decent shape (so it seems). I'm thinking it should be making enough vacuum to activate the valve. What say ye? Is this most likely a vacuum issue, or a diverter valve issue? Any advice before I find the lever and zip tie it into place? __________________ You only need two tools in life - WD-40 and Duct Tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape. If a hammer doesn't fix it, you have an electrical problem! Slot Cars, 1:24 Scale, 100MPH@100,000RPM, fastest things on wheels!

10-20-2013, 08:18 PM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,513	Re: '99 Burb a/c diverter The door actuators are electric these days, not vacumn. Here's a look behind the dash. Attached Images __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

10-20-2013, 08:57 PM	#3
Psycho71 Registered User Join Date: Jan 2006 Location: Kaufman, Tx Posts: 827	Re: '99 Burb a/c diverter Electric, OK. Does anyone know which is more prone to failure, the switch or the actuator? Thanks for the pic, I was looking for it today, and it wasn't in the same place the one on my '98 pickup was. __________________ You only need two tools in life - WD-40 and Duct Tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape. If a hammer doesn't fix it, you have an electrical problem! Slot Cars, 1:24 Scale, 100MPH@100,000RPM, fastest things on wheels!



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.