The A/C works perfectly fine. Yet when switching over to the heater nothing but room temp air blows out. This problem started at about 90,000 miles. Im planning on selling the truck soon and i would like to get it fixed. It has been freezing winters with the heater not working. I have had to replace the fan once before due to the wire harness connectors melting to the fan. Could that have started the problem? Or is it the A/C / Heater actuator not working? The truck now has 110,000 miles on her.

evaporat8ive emission system pressure sensor repair

My 2006 Sierra 150 truck was fine at midnight, but when I went to drive it in the morning the power steering would not work. The mechanic says the damage was done by a blown "cooler", but I did not have any overheating problems going to my appointment. Only had hard steering problems.

What r torque cylinder head torque specs and tightening sequence on a 2000 gmc sierra 1500 5.3 liter

when the truck is turned off the high beam light is on dim

before or after that point of 55mph, its fine runs great.

I changed ignition coil and ICM, but did not help. (I have gas in it). what is the most likely issue for my next step? Distributor?

when shifting into 4 wheel drive I can hear the actuator motor shift into 4 wheel then the actuator immediately shifts back out. Then after two attempts it stops all together.

When I start the engine it displays in park as it should. but when I shift into Drive is displays 3. If I shift into first or second it still stays on third. In neutral of reverse nothing is highlighted. As I said the tranny seems to be shifting ok. Any ideas?

I have replaced the surpantine belt and AC belt in Oct and both belt tensioners after the belt didnt work. After i replaced the tensioners the squeek was gone for a month but now this weekend in the morning there is a squeeky belt sound again?

I had a bad CV on the right side and there was a clicking noise. I changed both CVs this fixed the grinding but not the ticking. I found out hubs where making the clicking noise so I just replaced both hubs. After all this in turns there is a roughness still. Also not sure if its related but over rough pavement the whole truck feels loose.

every quarter tank of gas gets about 20 miles

the problem started about 9 months ago when I started the truck up and I noticed it was in 4wheel drive. it happens about every 2 to three months about 3 four times in a row.

Replaced plugs ,plug wires ,rotor and cap,and ignition coil about 7 months ago,actually saw ignition coil arcing to ground,ran fine. Having similar problem now,but don't see any arcing, after engine warms up ,runs well. Advance auto read code " multiple misfires" not much help.Thanks em

No oil stains anywhere and no smoke when i turn it on so, what can be wrong?

It is a 4wd 1500 I 1st had the ticking sound at slow speeds and then a few weeks later a binding and grinding when turning. I replaced both CV axle shafts and the right front was bad. After I installed the new CV's the next day I could hear the ticking again? Teh hub was replaced 2 years ago. Is this a bad CV again or maybe hub or brakes?

I have a 5.7 liter engine

I have put in a new water pump, flushed coolant and put in new antifreeze. There has not been any water in the oil. The cooling system was tested. There was no co2 in the coolant and it keeps pressure. I am lost as to where the antifreeze goes. The surge tanks stays fine for days then will start going down.

replaced water pump, flushed coolant system, new coolant. coolant level will stay up and then drop for no reason. mechanic tested coolant, head gasket. nothing found. now water or coolant in oil.

I have a 2007 GMC Sierra Z71 4x4. When I start it up, warnings come up and say that Hood is open, service tire monitoring system, service 4 wheel drive. Also, I have no power windows, locks, turn signals, no high beams and brake lights stay on. The wipers also do not work properly. Taking to dealer tomorrow. But any idea what it might be?

moving. A couple of times it would all of the sudden start pulling real good. When I first start it and take off it runs a whole lot better then it go's into snall mode ! I get terrible gas milage also. I had a 2006 5.3 that was twice as fast. I'm not looking for a race truck it's the heavy laboring to get it to go and I know it can run better. Mic says no codes and it's ok.

1 side blows cold while other side has warm to hot air why

3 worked until a few months ago. Priced control today then read it could be the resistor. Took the switch proper out and it seemed ok. Any feedback would be appreciated.

Service technicians have checked repeatedly and find nothing wrong.

have good spark,fuel,150#compression.has set p300 and p101 codes.did swap out maf with known good one.

has only happened twice this july. goes away when engine is shut down and cooled.

Had a DTC code P0171 and P0174 pop today, OnStar said I should be safe to drive home. Codes corresponded to running lean on both banks. Got home and checked it out and found the intake tube from the AiRaid Jr kit had become disconnected at the rubber elbow between the tube and the stock intake box. I installed the intake about 1500 miles ago, the light was only on for about 11 miles. I'm guessing the tube was only disconnected for 11 miles but it could have been as long as 1500 miles if the light and codes were never tripped prior

So my questions are
a) would the disconnected intake tube immediately trigger the light/codes?
b) if not, should i be concerned with any damage? is there any actions I should take?

When I pull the handle to release the tailgate it will not release for some reason, It sounds like it is releasing but it seems to be stuck.

When I pull the handle to release the tailgate it will not release for some reason, It sounds like it is releasing but it seems to be stuck.

When I pull the handle to release the tailgate it will not release for some reason, It sounds like it is releasing but it seems to be stuck.