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Posts Tagged: Buick

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

Car key won’t come out ignition switch – GM vehicles

Why won’t my Car key won’t come out ignition switch – GM vehicles Believe it or not, when your Car key won’t come out ignition switch it’s because of a rash of bad ignition switches in GM vehicles. When the switch fails in the open position, it doesn’t provide battery power to the Brake Transmission Shift Interlock (BTSI) fuse. The BTSI system consists of the brake pedal switch and a solenoid on the shifting mechanism. The BTSI prevents you from shifting into and out of park unless your foot is … Read More

GM PassKey and PassLock overview

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

C0040 ABS light on GM Saab

Fix code C0040 ABS light on GM Saab If you have a Coo4o or an ABS light on, read this TSB. GM has issued a technical service bulletin for Buick Rainier (05-07), Chevrolet TrailBlazer (05-08), GMC Envoy (05-08), and Saab 9-7X. The TSB #07-05-25-006 relates to a problem with the ABS system and results in a scan code C0040. GM advises you to inspect the right front wheel speed sensor for damage caused by rubbing against the A/C pulley. If you find damage, wire in a splice and then reroute … Read More

Knocking noise Impala, Grand Prix, Regal, Century

Fix Knocking noise on Impala GM reports that it has isolated the cause of a knocking noise Impala that sounds like clanking or banging noise that comes from the rear of the vehicle. The noise occurs when you are stopping or parking. It happens most often when the gas tank is between half and completely full. You guessed it, the gas is sloshing against the sides of the tank and making the noise. So you have two choices, either put in a newly designed tank that has more baffles, or … Read More

Sticking window Buick Lucerne

Buick Lucerne window sticks You may have a Sticking window Buick Lucerne 2006 window. The sticking window Buick Lucerne happens in freezing weather. Blame it on the glass freezing against the outer window strip. You would think this would be a no-brainer—to design a weatherstrip that doesn’t freeze in cold weather, but GM did it. The problem occurs most often after a car wash or rain (surprise!). Here’s the fix: Get Part #10361111 window stabilizer. Remove the outer sealing strip. Use a small knife (Xacto) to separate the lower strip … Read More

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