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Professional Automotive Repair Technical Discussions for March 23, 2016 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2003 Cadillac Escalade 6.0L Cruise Control VIN: 3GYEK63N23 Found Cruise Control inop. Looking at Cruise Control Data using a Tech 2 the stoplamp switch parameter should change from applied to released with pedal application. This vehicle is applied at all times, the brake pedal switch will change from released to appl... |
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| 2003 Chevrolet Tahoe LS 5.3L left turn signal VIN: 1GNEK13T93 This vehicle has me stumped...when you turn on the left turn signal, it works fine EXCEPT all 3 brake lights will also flash. I highly doubted a turn signal switch would fix it due to the 3rd brake light being involved, and I was right on that. I have gone ove... |
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| 2002 Pontiac Grand Prix SE 3.1L Hesitation, MIL Lamp on VIN: 1G2WK52J42 Car starts right up, idles fine. However when driven stumbles / hesitates / lack of power under load. Plugs and wires were original. Plugs in bad shape. Replaced spark plugs and wires. Symptoms seemed to improve slightly. Fuel pressure was good and increased a... Trouble codes: P0300 (Random misfire), P0420 (Catalyst), P0404 (EGR open position performance) |
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| 2004 Saturn Ion 1 2.2L Hesitation VIN: 1G8AJ52F14 Vehicle was towed in from another shop with a bad fuel line leak and also an intermittent no start and misfire. We repaired fuel line and also repaired misfire with a tune up and ignition module. Vehicle runs like a champ except on take off at times. The vehic... Trouble codes: P1599 |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2002 Chevrolet Trailblazer LS 4.2L radio VIN: 1GNDT13S22 ok I did not think of trying tech2. Truck is gone so its to late to try now.I have gm sub. so i can usually just re program and this unlocks. Will try tech2 next time .This radio would not allow holding buttons down to get codes to unlock.If i get any more in... |
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| 2008 Chevrolet Avalanche LS 5.3L MIL Lamp on VIN: 3GNFK12338 Thanks everyone for your comments and help. We performed a compression test and leak down on this engine and found that the #1 cyl is down 30- psi from the other cylinders. Losing pressure from the intake valve, I guess you can call it an internal vacuum leak!... Trouble codes: P1174 (Fuel trim cylinder balance bank 1). |
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| 2006 GMC Sierra 2500 HD SL 6.0L No communication VIN: 1GDHC24U66 Checked all wiring and dataline (bus) verified ok bad PCM |
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