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Prev Professional Automotive Repair Technical Discussions for April 14, 2011
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Open Help Requests for GM
Help Request Answers
2003 Buick Century Limited 3.1L high rpm VIN: 2G4WS52JX3
This vehicle came into my shop with a high idle issue. It was iddleing at 1850rpm checked for vacuum leaks and checked fuel pressure all was good. Pulled codes and had p0122 tps low volts and p1122 tps intermittent low volts stored as history codes no current ... Trouble codes: P0122, P1122
1998 Chevrolet C2500 Cheyenne 5.7L Poor Idle Quality VIN: 1GCGC29RXW
This pick up wants to surge at idle and when you take your foot off of the brake, it motors along quite fast whether in reverse or forward. There are no codes. We found that when the engine is cold, it all works well - iac at 190 & slowly goes down to about 10...
1999 Chevrolet S10 4.3L brake pedal VIN: 1GCDT19X8X
This vehicle is a co workers vehicle that we cannot seem to be able to duplicate the issues. For starters, about 4 months ago, the complaint was the ABS would kick in at random. Not like slow speed activation, because speed was not a factor. It would activate ...
2005 Chevrolet Silverado 2500 HD LT 6.6L Hesitation VIN: 1GTHK39275
this truck makes all the air gushing sounds heard when a turbo is not working properly. problem does go away at times and gets worse at times. any ideas Trouble codes: P0046, P0101, P0234, P2563
1992 GMC C2500 Sierra SLE 5.7L 1-2 shift VIN: 2GTFK29K1N
Driving down the expressway 70mph when suddenly the trans. appeared to go into neutral. NO slipping or unusual noises - I pulled over and realised that I have only 1st & reverse. Any ideas what I should check?
1997 GMC K2500 Sierra SL 5.7L Entire System VIN: 1GTGK29R6V
Hey everyone, I got this truck in almost a week ago and am pulling out my hair. It came in with no brake pressure. Found the rear line had no fluid from the proportioning valve and had to change the calipers & wheel cylinders to bleed the system due to seized ...
1999 GMC Savana 3500 5.7L Hesitation, Surge, Misfire, Poor Fuel Economy VIN: 1GBJG31RXX
The truck drives fine until at some point after it is warmed can be 100 miles later on a trip, it loses power. Vin R Vortec 5.7 Engine was rebuilt by another shop due to a bad intake leak. This problem happened before the rebuild and after. They tol... Trouble codes: P0339
2000 GMC Yukon Denali 5.7L fuel gauge fluctuates VIN: 1GKEK12R2Y
Every time it rains the vehicle has a no start condition. After rain subsides vehicle will start as normal. Already replaced fuel filter, coolant temp sensor, spark plugs and spark plug wires.
1983 Other GM DMC 2.8L Clutch Master Cylinder VIN: SCEDT26T9D
Hello DeLorean fans, Were a Volvo shop working on a 1983 Delorean (because it has the sometimes Volvo B28F engine). Approx. 55,000 miles on the odometer. This cars in nice shape but the clutch master cylinder is leaking. Im planning to install a new maste...
1997 Pontiac Grand Am SE 3.1L anti-theft VIN: 1G2NW52M4V
This vehicle came into the shop with an intermittent crank/no start condition. The lock cylinder and key were replaced and was a temporary fix. Code p1629 is now in the system, and from what I have read the IPC is likely the culprit. All else checks out as far...
2000 Pontiac Grand Prix GT 3.8L No Start, Cuts out VIN: 1G2WP52KSY
The car came in with a frequent no start complaint. The customer got it running and drove it in. I was able to drive it into the shop before it began to act up. I only took a couple attempts to identify the problem as a Pass Key system problem. The key I was l...
2002 Saturn Vue 3.0L 2-3 shift VIN: 5GZCZ63B02
Vehicle came in with a 3/4 flare. The fluid was quite dark and the used car dealer that sent it wanted to try a flush and seal conditioner. After doing it, we lost third gear completely. If we got going fast enough, it would go to 4th and 5th and lock up. The ...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Chevrolet K2500 Silverado 6.5L Wippers VIN: 1GCHK39F5P
1999 Chevrolet Silverado 1500 5.3L Cluster VIN: 2GCEC19T7X
In a rush looking forward to my vacation I negleted to look for the obvious. Found a blown ignition fuse. Replaced fuse and text drove vehicle 25 miles. to this date customer has not returned. as far as what fixed it, I could not tell you because I know th...
2005 Chevrolet Venture LS 3.4L MIL Lamp on VIN: 1GNDX33E05
hi guys most of the answers i got, i answer myself, but it is great to have other people tell you that you are correct. i tried to clean the mass air flow sensor, but it didn't work so replaced it, van ran perfect after that, gave to customer yesterday and was... Trouble codes: P0131.
2005 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1GCHC29U15
Thanks to everyone that responded, Nuno and Matthew had it pegged. After going back to the basics, checking vacuum, compression and so on, I found that the engine had irradic vacuum (it would fluctuate from 0 to 5 psi) and the map sensor was reading almost th...
2005 Chevrolet Classic 2.2L power door locks VIN: 1G1ND52F75
ok, feel kind of silly on this one, after reviewing owner manual on proper operation of power locks etc.,and a quick check to see key-in input to the bcm was ok i got to noticing the driver power lock switch liked to reside in the down position which explains ...
2009 Chevrolet HHR LT 2.2L Ignition Lock Cylinder VIN: 3GNCA23B39
Thanks for the responses. We ended up having to replace the lock cylinder housing. Whew, it's done. From now on, we'll replace both. We don't feel like such big dummies now. Everyone have a blessed day.
1995 GMC G2500 Vandura 5.7L wiper switch VIN: 1GDEG25K9S
Sure wish the 4 replies would have read the request-what good does it do to whack the motor with what ever is handy when there is no voltage passing though the switch ( checked at the connector at bottom of the column!) Anyways it was the new switch, just don'...
1999 GMC Sonoma SL 4.3L No Start VIN: IGCCS19X2X
The next time I encounter this problem I will do a complete scan of ECM & Body control computer.When I had no injector pulse,fuse was good & power to injectors,I guessed that the ECM was bad,so I replaced it.Wrong guess.So what can cause all the injectors not ...
1995 Oldsmobile Aurora 4.0L channel plate VIN: 1G3GR62C4S
juan sent me a nice diagram from tranibob showing exactly which bolts need be removed for channel plate removal, pump should be removed first anyway for easier removal and reassembly then select few thru-bolts as per diagram, thanks juan!job was successful wit...
2006 Pontiac G6 2.4L No start VIN: 1G2ZG58B47
Well I tryed a ignition switch and it didnt work. So I started to pull fuses and see if the circut would change. When i got to the abs fuse the whole system went dead. I left it set for about 5 minutes and it fired right up. Found that the abs module was draw...
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