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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 28, 2010
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1993 Cadillac Eldorado 4.9L Cuts out, over 4200 rpm VIN: 1G6EL12B4P
I have repaired wires to MAP and IAT sensors replaced both sensors also. Have replace cap, rotor, coil and dist. Have replaced fuel filter. Have replaced PCM and PROM. Fuel pres is about 40 psi at idle over 45 psi at WOT. It pops from intake when it begines to...
2006 Cadillac SRX 3.6L Front Struts VIN: 1GYEE63766
I have a strange problem with te front struts on this srx and I can,t find much info on them. There is no code in the suspension system but both front stuts have no movement. They are locked. You can,t bounce the car, it is like driving a car with no suspensio...
1985 Chevrolet El Camino 5.0L Carb VIN: 3GCCW80H2F
I have a customer that is wanting to remove the electronic feedback carb. and install a Elderbrock unit. That part is not the issue, my question is the torque converter still going to lock up if I diconnect all of the eletronics from the old carb? Thank you fo...
1995 Chevrolet C1500 Silverado 5.7L rt brake
hi all, i'm a honda guy working on this chevy pickup for a friend.came in for a brake job, routine, replace the pads, machined the rotors.rt side pads were a little more worn than left, but not enough to be concerned.the caliper pistons retracted fine, one sid...
2004 Chevrolet Trailblazer EXT LT 5.3L Poor Fuel Economy, MIL Lamp on VIN: 1GNET16P34
Hello we received this vehilce originaly for cat code p430 and rattle on the right bank replaced with GM cat. Other technition performed the changing of the cat. Customer took vehicle and drove a few miles away and vehicle stalled on them called us she drove i... Trouble codes: P0133 (02 signal low b1s1), P1133 (Ho2s b1s1 insufficent switching), P1134 (Ho2s b1s1 transition timefault), P1153 (Ho2s b2s1 insufficent switching)
2006 Chevrolet Impala LS 3.9L Cooling Systems VIN: 2G1WC58106
hi to all. vehicle came in overheating over half gallon low on coolant..filled system and pressure test no leaks showing and holding pressure. ran engine and has major amount of air in system.tried to bleed system for approx an hour and a half and still has co...
2006 Chevrolet Silverado 2500 HD LS 6.6L Tcm VIN: 1GTHK23D26
No communication with Transmission contorl Modeule. client says Starts and drives but has little but of a buck driving down the road. Intermittant no communication with glow plug modules and ECM. If you erase the codes for TCM they will reappear with in second...
2008 Chevrolet Tahoe LT 5.3L ride sway VIN: 1GNFK13018
customer complained of vehicle sway while driving and turning above 30 mph. "feels like it's going to roll over. been like that since it was new. thought it was 2 ply side walls causing it". he buys 10 ply dunlops from us and it makes it alot worse. checked ev...
1998 GMC C-Series Topkick C6H042 6.6L Low Power VIN: 1GDJ6H1JXW
Truck came in with a hard start when hot, truck ran fine with plenty of power, to fix the hard start we pulled the fuel injectors-mechanical type and replaced the o-rings. that fixed the hard start but now we have low power on take off and cruise. took it to l...
2003 Hummer H2 6.0L rear air susp. VIN: 5GRGN23U73
hello hummer tech's thanks in advance for help this vehicle is driving us crazy. if parked on level vihicle will stay up indefinetly. If parked on uneven ground over vehicle goes down in 30 minutes.
2002 Oldsmobile Bravada 4.2L Poor Idle Quality VIN: 1GHDT13FX2
Hi all in IATN land. Thanks for reading my post. This Bravada will rev over 3000 rpm without touching the throttle. It happened to the customer and she almost went through the cemetery fence before she turned the key off. When she restarted, it was fine. I sta...
2002 Oldsmobile Aurora 4.0L Poor Idle Quality, Surge, Stall VIN: 1G3GS64C12
car idles up sometimes to 2000 rpm on its own. It was going to 4000 rpm before the gaskets where replaced. now it seems there are vacuum leaks at the throttle body, by the iac and the gasket between the throttle body and intake manifold tube.Do i need to chang... Trouble codes: 171 (right bank lean), 174 (left bank lean)
2003 Oldsmobile Alero GL 2.2L Steering VIN: 1G3NL52F23
Hello everyone, this alero has this annoying little noise when you move the steering wheel slightly(left or right).it squeaks like two pieces of rubber being moved back and forth against one another.it makes the noise loaded or unloaded.i've tried loosening t...
2000 Other GM H1 6.5L Left Rear Hub VIN: 137ZA8434Y
Hi,we have a 2000 hummer h1 that has a rotational growl/thumping type noise from the left rear hub. We have removed and disassembled the hub and inspected the gears and bearings - all components look to be in good condition.looking for anyone with a repair for...
2004 Saturn Vue 2.2L Cruise VIN: 5GZCZ23D04
This car came in with the cruise inop. The light turns on with the power switch on the steering wheel, but when you try to set the cruise, nothing. Check for codes and no codes in any of the modules. Checked fuses and all tested good. Researched and did not fi...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Chevrolet Lumina Euro 3.1L Poor Idle Quality VIN: 2G1WN14TOL
had 180 lbs compreesion on all cylinder but had 140 lbs on number four cylinder had jumped time custmer declinded repair due to vaule of car
1991 Chevrolet Corsica LT 3.1L injector
I"m sure all of you assumed I tested the TPS but I did not. It read good on the scanner and was hard to unplug so I skipped it. Jimmy of Virginia & Rod of Kentucky suggested it.With TPS unpluged it cranked & idled fine.Replaced TPS & it"s fixed.I was out of ti...
1993 Chevrolet Camaro Z28 5.7L Hesitation, Cuts out, Misfire VIN: 2G1FP22P1P
Well, I appologize for the delay in the closing of this help request but I wanted to make sure I had a fix to post. As the customer was ok with us keeping the vehicle as long as we needed, it became a project for the back burner and as we had time and since it...
2001 Chevrolet Express 2500 5.0L Misfire VIN: 1GCFG25M41
Thanks to all who repied, especially Robert from Utah for the info about the air pump being electric. Those that said the PCM needed a reflash were correct. The dealer called to say that the reflash took and the missing cylinders started working. Like Jack fro... Trouble codes: P0341 (CMP sensor circuit out of range), P0418 (Air pump relay control circuit problem).
1998 GMC Jimmy SL 4.3L heater control VIN: 1GKDT13W0W
Removed dash cover and replaced the blend door motor.Took apart the old motor and found a broken gear,it still functioned BUT the control head saw more movement than required and could not calibrate.The main drive gear was split on one side.Re-assembled with ...
2003 GMC Safari 4.3L No Start VIN: 1GKDM19X83
Received the van back and was doing some test the first test I went with was the cranks sensor I probed it with my scope to check the signal and it would not start I moved the connector and it started. When I moved it, I also noticed that the sensor was a litt... Trouble codes: P1626.
1994 Oldsmobile 88 Royale 3.8L Misfire VIN: 1G3HY521LR
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