Last resort is take to shop to fix

[uncleiceberg]

youve been a great resource in the past for my questions so i'm back with some new ones.
my heater does not blow anymore, if i'm on the freeway and doing 80 than hot air trickles out and if i'm stopped then no air at all. the air that does come out is in fact HOT but the vents do not blow like when the truck was new. i've checked the fuses and none are blown and my filters are clean.

same with the A/C. blows cold on the freeway but when on surface streets no action.

the rear unit i've seen some threads for. the rear unit actually works but blows ice cold on cold days and red hot on hot days.

thanks.

iB

 

[anguyen325]

possibly your blower motor is shot. take out the motor and test it.

 

[uncleiceberg]

thank you anguyen325, i'll get to that this weekend possibly next week and post what I find out.

 

[Screwd up 6]

Check this out too
http://www.gmfullsize.com/forum/showthread.php?t=196198

 

[blairian]

Agreed, sounds like a bad blower motor. High speeds force enough air through to get some action, low speeds do not. That would be the first thing I'd look at.

Sent from my DROID RAZR HD using Tapatalk 2

 

[TimzDenali]

+3 on blower motor

 

[labbu63]

Agreed, sounds like a bad blower motor. High speeds force enough air through to get some action, low speeds do not. That would be the first thing I'd look at.

Sent from my DROID RAZR HD using Tapatalk 2

Exactly what i was thinking. High speed just forces the air through.