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Prev Professional Automotive Repair Technical Discussions for March 30, 2011
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Open Help Requests for GM
Help Request Answers
2002 Cadillac Seville STS 4.6L Radio Navi Unit VIN: 1G6KY549X2
Any Caddy master tech? Radio/Navi unit of this 2002 STS has error message "no system software - incorrect disc please insert correct software disc" . This is Japanese Denso unit GM part # [...]. I was able to get GM software update disc's (2 disc's for STS ...
2001 Chevrolet Venture LT 3.4L Fuel gauge erratitic VIN: 1GNDX03E61
Fuel gauage floats from full to empty. C305 connector is clean and tight
2002 Chevrolet Impala 3.8L Electronic VIN: 2G1WH55KX2
Customer was explaining that when he would come to a stop the brake pedal would activate as if it were in a ABS style stop, pedal pulsing and he could hear the motor under the hood. We have not been able to duplicate his situation, brakes are working properly ...
2002 Chevrolet Impala 3.8L races VIN: 2G1WH55K72
Hi group. This vehicle will slowly raise idle to 2500rpm and above.I have a Tech2 and all the pids seem normal except rpm and desired rpm which is about 650-700. The actual rpm slowly climbs up along with the IAC counts which go up to around 170 and never lowe...
2004 Chevrolet Suburban 1500 LT 5.3L temp doors VIN: 1GNEC16Z04
on the back of the control head are two dark blue wires, one for the left side temp door motor and one for the right side. when moving the temp control knobs, i have varying voltage on one side(right), but not the other (left, driver side). after verifying thi...
2004 Chevrolet Impala LS 3.8L Poor Idle Quality, Stall VIN: 2G1WH52KX4
This car has a dies at idle after 15 to 20 seconds cold. Fuel pressure is steady and IAC counts increase as it drops RPM and dies.In testing it dies 2-3 seconds after closed loop. As it dies the Ign voltage drops to bat voltage. The 5v ref to the alt drops to ...
2004 Chevrolet Silverado 1500 4.8L readiness monitors VIN: 1GCEC14V64
Hi fellow techs, I got this truck in to reset the readiness monitors. I took it on its drive cycle and the monitors all reset, but when I turn the keyoff and back on they are no longer reset. I know it is a problem with keep alive memory of the pcm. What I wou...
2007 Chevrolet Malibu LT 3.5L alarm VIN: 1G1ZT58N37
My brother called me last night with this car. I will be working on it this weekend so I am looking for some information. He said when he got home from work the horn was on steady and the headlights were flashing. He tried to reset the security system accordin...
2010 Chevrolet MALIBU 2.4L No Start, Stall VIN: 1G1ZA5EBXA
Hello this car is a friend of my boss.boss leaning toward theft problem car starts and stalls after holding key to start mode car will continue to crank no fire until key turned to off then will go back to start stall no codes in theft we have a tech 2 here ar... Trouble codes: B1325 (Device power 1 circuit voltage below threshold)
2010 GMC Terrain 2.4L Engine VIN: 2CTFLJEW7A
Customer stated concern of engine tick noise at idle, vehicle was in for an oil change. No abnormal noise was noted on our inspection, sounds like normal injector tick is customers concern. When customer picked up vehicle she informed us that she has another 2...
1989 Oldsmobile Cutlass Supreme 2.8L No Start, Stall VIN: 1G3WH14W9K
This vehicle came in from another shop. The story is as follows. Customer got the car from his deseased father drov it acouple of times it would stall every once in awhile he stopped at a store it stalled and never started for him (cranked fine)my friend's sho...
1992 Oldsmobile 88 Royale 3.8L MIL Lamp on VIN: 1G3HN53L0N
This olds came to me for an imtermitent stall. When it stalled i got a code 42. I replaced the ignition module. After replacing it code 42 was always on. I went ahead and discharged the capasitors and the light went out. After letting it idle for a while the l... Trouble codes: 42 (electronic spark timing problem)
1999 Oldsmobile Alero GL 2.4L egine idle miss at rpms over 1000 engine runs good VIN: 1G3NL52T2X
replaced coil packs, plug boots resistance is .5 very low resistance, added note, vacume at fuel pressure regulator very jumpy about 5hg, suspected vaccume leak
2005 Pontiac Sunfire 2.2L Steering VIN: 3G2JB12F05
Customer complaint of no power steering, mainly on left turns. Found that turnign right, there is normally power steering, but turning left no power assist. This vehicle is not electric. Replaced power steering pump and now we have intermittent power steering ...
2002 Saturn SL 1.9L will not park VIN: 1G8JU52F2Y
any help on wiper will not park

Fixes & Summaries for GM
Fix/Summary Answers
1986 Cadillac Seville 4.1L Poor Idle Quality VIN: 1G6KS6984G
thank you all for the push to follow harness, with old brittle wire harness we were a little hesitant to proceed. we removed loom and tape, a few crunchy parts fell off, about 16 inches back from coolant sensor, below rear valve cover we found our fault, sect... Trouble codes: 14 (Coolant temp sensor), 59 (Vcc temp sensor circuit problem).
2002 Chevrolet Express 3500 5.7L MIL Lamp on VIN: 1GBH31R721
found wiring on top of trans rubed through and was causing low voltage repaired wiring and working fine at this time.
2007 GMC Yukon Denali 6.2L Left rear signal light VIN: 1GKFK66847
Traced to break between fuse box and BCM (jumper wire and light worked). Removed fuse box, removed wire loom off harness going into firewall on left front. Yellow/black wire rubbed on fender and broken. Repaired (no other wires were damaged). Working now!!...
1947 Oldsmobile 98 257CID start system wiring VIN: 000847280H
Well, no wiring diagram but John [...] had the information I needed. Seems that there is a part missing on this car. The starter vacuum switch. Whatever that is... Anyway, the extra wire runs up to the voltage regulator and powers this missing vacuum switch. T...
2003 Pontiac Vibe 1.8L Air Bag Light VIN: 5Y2SL62883
I am closing this because of time limits on iatn, the vehicle is scheduled to be back in soon, when we get it back and fix it I will post a fix back to this help request. Thank-you to all who replied.
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