Rick's Free Auto Repair Advice

Posts Tagged: Pontiac

Engine Overheats – GM vehicles

Engine Overheats No radiator fans on GM vehicles, Chevrolet, Impala, Pontiac, Buick, Cadillac GM uses a pretty nifty technique to control the radiator fans on late model vehicles. The system consists of two fans and three relays. When the powertrain control module (PCM) detects the need for cooling from the engine coolant temperature sensor (ECT) at 223 degrees or refrigerant pressure above 190-psi., it provides a ground signal to the low speed fan relay. Power flows to one fan, and the ground for that fan flows to the second fan. … Read More

no start no crank no click – GM

How to diagnose a no start no click on GM vehicle. If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that. In the old days, power flowed through the ignition switch and down to the starter solenoid. Not anymore. The ignition switch now talks to the body control module (BCM) and it’s the BCM that initiates one of … Read More

Passlock III reset procedure

How to do a Passlock III reset This is one in a series of articles. READ THIS FIRST GM made several different types of anti-theft systems. VATS, PassKey, and PassLock. The troubleshoot and reset procedures are different for each. PassLock seems to have the highest failure rate. So if you have a key WITHOUT a chip in it, chances are it’s a PassLock system. This article describes how to troublshoot and fix a PassLock system. But here are some more articles to help Click here to see the resetting procedure … Read More

Passlock reset procedure

How to perform a PassLock Reset This is one in a series of articles. READ THIS FIRST GM made several different types of anti-theft systems. VATS, PassKey, and PassLock. The troubleshoot and reset procedures are different for each. PassLock seems to have the highest failure rate. So if you have a key WITHOUT a chip in it, chances are it’s a PassLock system. This article describes how to troublshoot and fix a PassLock system. But here are some more articles to help Click here to see the resetting procedure for … Read More

Passkey II reset procedure

This is one in a series of articles. READ THIS FIRST GM made several different types of anti-theft systems. VATS, PassKey, and PassLock. The troubleshoot and reset procedures are different for each. PassLock seems to have the highest failure rate. So if you have a key WITHOUT a chip in it, chances are it’s a PassLock system. This article describes how to troublshoot and fix a PassLock system. But here are some more articles to help Click here to see the resetting procedure for PassLock Click here to see the … Read More

GM PassKey and PassLock overview

Diagnose problems with anti-theft systems in GM vehicles Read More

Clunk noise in steering

Fix clunk noise in steering on GM vehicles If you have a Clunk noise in steering in a 1997-2005 GM it’s caused by a “stick/slip” condition in the intermediate steering shaft. This is the portion of the shaft that goes from the steering column down to the rack. Because it has a flexible joint in it, the shaft is made to expand and contract. You guessed it, the grease they used causes it to bind. The new grease is part of a kit #26098237. You remove the intermediate shaft and inject … Read More

Droning noise from car on Cavalier and Sunfire

Fix droning noise from car on Cavalier and Sunfire Cavalier or Pontiac sunfire Got one of these with the 2.2L (Vin4) engine?  The droning noise happens most at high outside temps with the engine idling and the A/C on.  The problem is the accessory drive belt developing a resonance in the span between the alternator and A/C compressor.  The fix is to install a newer design belt GM #12575450.  The new belt is made out of a newer rubber compound that eliminates the noise. © 2012 Rick Muscoplat Save


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