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Prev Professional Automotive Repair Technical Discussions for February 20, 2012
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue 3.8L Cooling Systems VIN: 1G4CW52K5S
Hello all, and thanks in advance. As stated this is a regular customer of ours and we have done lower intake and new plenum less than a year ago. Car came back in yesterday with a radiator full of BROWN milkshake. The oil is about 2 quarts low on the dipstick....
2004 Cadillac CTS 3.6L block VIN: 1G6DM57734
Needs motor does this motor have to come out bottom with trans or can it come out top without trans GM's procedure to take it out the bottom seems unnecessary.Thanks in advance. Jim
1997 Chevrolet K3500 Cheyenne 7.4L Poor Idle Quality, Misfire VIN: 1GCHK39J6V
Engine in this truck was replaced after getting washed with fuel while towing a camper and fuel regulator failed. Owner of the shop's truck-(My father-in-law). He has been wanting to repower it anyway. New Jasper transmission too. Anyway- the engine is cutting...
1999 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GNEL19W1X
showes missfire #1 2 and 3 cyl most miss on #2 some times most # 1 , checked compression all cyl 150 155 plugs good and clean did injector leak test drops 10 lbs each cleaned on car with 3m cleaner vacum good dist timing 0 did waveform on cam and crank sensor ... Trouble codes: P0300
2003 Chevrolet Cavalier 2.2L starter VIN: 1G1JC52F53
Customer complaint is he has a no start, and has to jump the battery. However, only happened twice. First time, about 1.5 years ago, customer was driving down the road and the vehicle just died. Had to have jumped to get going again and then everything was fin...
2004 Chevrolet Aveo 1.6L Mechanical VIN: KL1TD52674
Hey fellas. Customer brought me this aveo told me he wants a new oil pump installed. He even bought the pump at the dealer. Original complaint was low oil pressure hot. He said it down to around 5-10 psi. I told him I wanted to double check the pressure and ha...
2007 Chevrolet Impala LT 3.5L Poor Idle Quality, Stall, Misfire VIN: 2G1WT58K67
came in with 2 wk history of increasing difficulty just at startup. verfied fuel volume and quality, spark, wires, plugs, no vacuum leaks. On cold startup only, and lasting no more than 5 seconds sometimes less. Car will behave like wet plugs, a misfire that c...
2000 GMC C7500 Topkick C7H042 7.4L crank sensor VIN: 1GDJ7H1D6Y
I put new engine in this truck and when engine is cold it runs perfect, but when it reaches normal operating temp it sets a crank code po336 and starts to backfire through exhaust. at one point the converter started to glow and flames were coming out of the ta...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Buick Rainier CXL 4.2L Down shift VIN: 5GADT13S45
I'm closing this help request because the customer is returning the vehicle to the dealer for a possible repair should they get factory to cover some of the cost of repair. I have concluded that the problem does indeed lye within the transmission assembly. O...
2003 Cadillac CTS 3.2L Misfire VIN: 1G6DM57N93
We finally plugged in a coil pack and it fixed the vehicle. One reason we had such a problem was the fuel trims were lean. We assumed that meant meant it was not a firing problem, for that we would have a rich trim. But we also found out the computer shuts do... Trouble codes: P0128, P0300, P0301, P0306.
1997 Chevrolet C3500 Cheyenne 6.5L Trans WOT shifts VIN: 1GCHC39F5V
Thanks for the replies! A simple test revealed the facts. I hooked up the scan tool and monitored RPM. Cranking a electronicly controlled injection pump with a drill brought the RPMs right up. Since my customer was reluctant to spend the money ($1150 plus inst...
2001 Chevrolet Silverado 3500 6.6L Converter seal VIN: 1GCJK33161
Thanks for all the good advise, ended up putting in a new converter seal and took care of leak. Was a little iffy on just the seal but so far so good.
2008 Chevrolet HHR LS 2.2L Power locks Shift interlock VIN: 3GNCA13D38
Its fixed! Thanks to everyone who took their time to respond. But it was greg who was closest. Had to get the launch updated to see trans data. Switch "b" in the shifter position switch was cycling hi lo while this was happening. When I went to put my meter on...
1997 Pontiac Firebird Formula 5.7L sparkplug threads VIN: 2G2FV22P5V
Alot of suggestions for thtread repairs. unfortunately this cylinder head is built with the exhaust valve next to the threads for the plug. The edge of the factory threads are even with the exhaust valve when closed. A larged thread would contact the valve....
2004 Pontiac Grand Am SE1 3.4L starter VIN: 1G2NF52E64
Ok this vehicle i diagnosed with a bad ecm sent to dealer had pcm programed Dealer called said it would then crank but not start most times. They then removed crank pulley and found wires for crank sensor rubbed through. Replaced sensor now car starts and run...
1997 Saturn SW1 1.9L Mechanical
thanks to everyone the mainshaft nut was tight i have a rebuilt valve body ordered from sonnax $200 bucks thanks terry
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