20 Most Recent 2005 Chevrolet Suburban - Page 7 Questions & Answers

Check the vent solenoid.I suspect the check engine light is on?Even if it is not the vent solenoid is the usually suspect. To find it locate the charcoal canister. there will be a couple of larger tubes going to it. one will go back to the gas tank and the other will go to the vent solenoid. Disconnect the hose from the solenoid and try to blow through the solenoid. If you cannot than the vent solenoid is stuck shut. It should be open with the key off. This is a pretty common problem with most gm vehicles. I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Best place to start bigger better ground.

UNDER DASH ON PASSENGER SIDE YOU WILL FIND YOUR BLOWER RESISTOR MODULE IT IS MOST LIKELY BAD I SEE ALOT OF THIS PROBLEM IM MY SHOP MAJORITY ENDS UP BEING THIS

try a manual pressure gauge and see what happens

usually the sensors (2) are good but the harness goes bad and there is corrosion at the knock sensor connection. The intake manifold need to be removed and the harness replaced. KNOCK SENSOR 2 IS THE REAR.