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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 5, 2011
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2006 Buick Rendezvous CXL 3.5L suspension VIN: 3G5DA03LX6
This Vehicle has bumping noise what seems to be in right front. We replaced both front struts and mounting plates after going over vehicle and not finding any obvious wear in anything but noise is still present. I can apply light pressure on brake and noise is...
2006 Cadillac STS 3.6L Headlamps VIN: 1G6DW67796
Hi All, We replaced the headlamps and marker bulbs on this Caddy and ever since the headlamps have fogged up. This car is NOT equipped with HID. GE bulbs were used. NOTE: Due to difficulty to access the headlamps on this car we used LED maker bulbs due to long...
1996 Chevrolet C1500 Silverado 5.0L Surge, Cuts out VIN: 1GCEC19M8T
Hope someone can help with this one, I replaced the motor in my brothers truck(w/ rebuild) replaced the dist w/ cap, rotor , spark plugs, wires, new water pump, t-stat,fuel filter,misc. He drove it for about a week & said it had surged once, and hadn't done it...
2001 Chevrolet Impala 3.8L security VIN: 2G1WF55K61
Replaced cat did pcm reflash and alarm relaern with a tech 2 through tis website. Car starts and runs but after 30 seconds the security light comes on and stays on. THe car will continue to run and light will stay on all the time. Shut off the car and restarts...
2006 Chevrolet Silverado 1500 LT 5.3L Cooling fans VIN: 2GCEK13T06
Truck came back with cooling fans stuck on low. Rescanned P0480 reset (low speed cooling fans circuit), Can command low, med, and high speed fans both on and off. Both left and right fans run on low speed with key off only. If key is cycled to on fans turn off...
2009 Chevrolet Express 3500 6.0L Electronic VIN: 1GCHG39K09
This vehicle is consistently setting code PO894. The transmission filter and fluid was serviced at 38000 miles and the fluid looks good. I have found a TSB concerning this code stating to drop pan and check inside of filter for containments and if anything fou...
2010 Chevrolet hhr 2.2L Misfire VIN: 3GNBAADB7A
Came in with check engine lt on. Scan tool showed 300 miss, 172 rich, and 1174 trim balance. Swapped coil and plug with another cylinder, but miss stayed in same place. Smoke test was performed on evap system but no leaks were detected. Also, blocked off evap ... Trouble codes: P0300, 172 (rich), 1174 (trim balance)
2001 Geo PRIZM 1.8L Unknown VIN: 1Y1SK52881
engine has a strange tapping noise that comes and goes.I thought noise was play in timing chain so i replaced the timing chain tensioner and retested. noise is still present. with vehicle idling noise will come and go with no rhyme or reason. the longest it wi...
2001 GMC Safari SLE 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTDM19W61
Vehicle idles rough all the time, hot or cold. Runs perfect off idle with no misfires. Towes a trailer no problem with plenty of power. Cyl number 5 and 6 racking up misfires constantly at idle. Smoke tested intake with no external leaks found. Trouble codes: P0155, P0300, P0452
2006 Hummer H3 3.5L Tpms VIN: 5GTDN13646
Vehicle came in for service TPMS message on dash. When going to learn mode, horn chirps twice and icon flashes, just like it is supposed to. Then I go to each wheel, activate the sensor, horn chirps once for each wheel. After the fourth chirp, the light should...
2000 Oldsmobile Intrigue GLS 3.5L p1860 VIN: 1G3WX52H94
start car has hyd-grown will move but slips for 15 sec then will not move at all in any gear as if in nuetral also wine is gone
2007 Saturn Aura XE 3.5L Cruise/Rev Lights/Pwr Locks VIN: 1G8ZS57N17
The customerís complaint is the Cruise Control, Reverse Lights and Auto Locks are all inoperative. Iím thinking ďOK itís probably the trans range switch." But apparently NO. I suspected the trans range switch because that could be related to all three affected...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Buick Rendezvous Ultra 3.6L No Start, MIL Lamp on VIN: 3G5DA03765
replaced vent valve & purge solenoid so far so good thanks everyone for the help Trouble codes: P0449.
2003 Cadillac Escalade ESV 6.0L Front Differential
Thank you for all of the excellent responses. The customer is reviewing their options and therefore I have not performed the repair at this time. Without the iATN responses I received for this Escalade I would have had many hours in this vehicle with only bad ...
2002 Chevrolet Blazer Xtreme 4.3L Misfire VIN: 1GNCS18WX2
Well, I thought this thing would be back so we could fix it. Customer ran out of money so he should be back soon. We ended up pulling the valve cover and put a straight edge on the valve stem on #6 exh valve was to high. So when he get some funds we will b... Trouble codes: P0300 (missfire).
2003 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNDT13S23
By most of the replies I am thinking that it is either a temp sending unit or a thermostat I have ordered both and still waiting for the customer to come back. As soon as I fix this I will update this request. Trouble codes: P0128 (Coolant temperature below thermostat regulating temp).
2003 GMC Sonoma SLS 4.3L Poor Idle Quality, Misfire VIN: 1GTDT19X43
we were never able to id the misfire which did not repeat itself after the first couplke of times. as to the cat and evap readiness we had to drivr the vehicle for for nearly 2 weeks repeating the gm cycle over and over again till it fianaly set. Trouble codes: P0303.
2003 GMC Envoy SLE 4.2L MIL Lamp on VIN: 1GKDT73SX3
Greetings fellow techs, I'll call this one a fix. Removed and cleaned the throttle body on advise from David, Charles and Patrick, and it seemed to work. Drove the car about 20 miles today to run monitors and it went through NJ inspection. Thanks David for... Trouble codes: P0105, P0107.
2004 GMC Yukon XL 1500 SLT 5.3L driver's power seat VIN: 3GKFK16Z04
Thanks for the replies, pretty sure that this is a driver's seat module issue, may just need reprogramming as many of you suggested, customer is going to live with it for now, thanks again & have a great day all!!!
2004 GMC Yukon XL 1500 SLT 5.3L 2-3 Shift VIN: 3GKEC16T24
Customer let us pull the pan on the transmission. There was clutch pack material every where. Leading me to believe that the replies concerning the 3- 4 clutch pack being the culprit were correct. Customer cannot afford to repair the vehicle at this times,so h...
1995 Oldsmobile Achieva S 3.1L shift into reverse from park VIN: 1G3NL55M5S
Well thanks for all the help given. The idle was way too high and I noticed that the pcv valve was making a weird rattling noise. so i pulled it out of the valve cover and the engine stalled. I cleaned the throttle plate and tried it again. the engine idle...
1998 Saturn SW2 1.9L Misfire VIN: 1G8ZK8270W
Found a technical tip on scanner saying if plugs were replaced with A/C delco plugs and still having driveability issues to replace them with NGK spark plugs so we did and car drove fine and has not returned. Trouble codes: P0137, P0131, P0300, P0341, P1640 (Driver 1 output voltage high), P1599 (CC Power Management Mode or Engine Stall).
2005 Saturn Vue 2.2L Cuts out VIN: 5GZCZ23DX5
the fix for this saturn was a new throdle body and repair the ground on the moudle under the hood next to the throdle body special thanks to DAVID HOUEN for his time thanks nick Trouble codes: P1599, P3921, P2019.
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