Questions & Answers for: GMC Yukon XL air in pipes

...air, but it blows? I'm going to answer as if the second guess is your problem. Looking at the bottom of the truck under the heater that is in the back you should see 4 lines going into the heater box ...

...of can cause your problem but rarly seen does your fan work or any leakage or low coolant can cause air pocket and overheating no heat. let me know and we go foward There is a fitting on the intake ...

2003 yukon xl front a/c not blowing cold air.back working just fine. added r 134 last week ,with low side pressure of 70 psi,high side at 275 psi.what could be the problem {: ) Try to feel the the a/c

...air intake tube to the throttle body & use a spray can of carb spray & a shop towel to clean the carbon from the throttle bore & plate. Fuel Composition Sensor Replacement - Removal ...

...on the load, RPM, and several other factors. idle valve on the intake needs cleaning and the lower air intake pipe ...

...air. this causes a lean code usually. you can spray the EGR tube to check it by spraying choke cleaner into the silver portion of the sleeve around it. if you notice the idle smooths out or picks up, ...

The air works in my 2001 GMC Yukon but it only blows through the defrost and the floor. What could be the problem and how can I fix this? I think the flapper doors which direct the air flow are all ...

...O2 sensors still install in pipes? (have they ever been replaced) Air intake sensor still installed and is not damaged? Test pressure output of fuel pump. Replace fuel filter if not already