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Prev Professional Automotive Repair Technical Discussions for February 27, 2007
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L engagement VIN: 1G4CW52L6R
after service let vehicle sit and get cold , trans will not engage untill warm or pumps 3-5 min then works perfect, replace filter again same condition, pressure test after cold good, still no engage untill warm, fluid level high after sits, then normal, possi...
1998 Cadillac Catera 3.0L Excessive Emissions VIN: W06V452R2W
Vehicle is failing for high nox, allowed is 400 and 687 at 15 + 25 mph on dyno, o2 sensors switching fine, engine temp in acceptable range, air injection system working properly, long term fuel trim +/- 1%, no vacuum leaks or false air leaks, we have replaced ...
1993 Chevrolet Astro CL 4.3L transfer case VIN: 1GNEL19W5P
1997 Chevrolet S10 LS 2.2L Misfire, MIL Lamp on VIN: 1GCCS1945V
Only in the morning it will miss on #1 and #4 cyl. Checked spark. It has spark at the plug. Ohmed coils they are ok.Couldn't check inj. pulse because onse it warms up it runs fine. If anyone has any ideas please let me know. I will check inj. pulse in the mo... Trouble codes: P0300
1998 Chevrolet Blazer 4.3L Park rev neturl drive indicator VIN: 1GNDT13W9W
The shift indicator lights up normally in park but as soon as the shift lever is moved the indicator light that is over the P goes out and no other shift position will light up. When shifter lever is moved down into lower drive gear the park indicator light wi...
1998 Chevrolet Prizm 1.8L No Start, Stall VIN: 1Y1SK528XW
(Scream here) Driving me nuts. It will start for about 2 seconds with a bright injector pulse but then it fades out. Has an ignition module "fail-safe" mode code don't know # (at home). Searched archives to no avail except for one post with similar symptoms th...
2000 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDX03E2Y
car came in for "check engine"lite and regular service. code was p0410.found blown fuse in fuse box for air pump. replced fuse,cleared code and test drove van.now it is seting code for crank sensor p0336.we figuered that in process of replacing crank seal we m... Trouble codes: P0336 (testing and results)
2000 Chevrolet Tracker 2.0L Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2CNBE13C7Y
Hi Tracker Fans and Tecs. This love machine was towed in Monday. Starts and run raggdy. Check engine light on and blinking. Scan computer and retrieved P0300 in codes and data and P0303, in freeze frame data. Remove #3 spark plug and found electrode missing al... Trouble codes: P0300 (random cylinder misfire), P0303
2001 Chevrolet Blazer LS 4.3L radio VIN: 1GNDT13W21
Dear group, I received, BLAZER 96. Replaced the battery.The theftlock was activated. Now dont have the code and the radio says loc. Please advise. The first 3 digits of the display code are displayed: 232 the next 3 numbers: 235
2001 Chevrolet Silverado 2500 HD LS 6.0L booster VIN: 1GCHK23U11
So, here's an 01 chevy with HYDRO boost. Owner says after sitting three days,truck starts up with no power steering or power brakes. After a minute or so of playing with the wheel,pressing the brake pedal and reving it up to 1500 rpm a growning noise is heard ...
2003 Chevrolet Venture LS 3.4L MIL Lamp on VIN: 1GNDX03EX3
This one came in with MIL on, cust. stated it ran fine. Found code 131 for O2 voltage low. On the freeze frame it showed that PCM was operating in OPEN Loop, O2 showing lean, Coolant temp was 195F, TPS at 100%,4800 rpm 73mph.OK, Van has 134000 miles,orig. O2 I... Trouble codes: 131 (HO2S low votage)
2003 Chevrolet Trailblazer North Face 4.2L MIL Lamp on VIN: 1GNET16S13
Vehicle was originally brought in w/ complaint that it would stall intermittanly and the SES light is on. Codes p0335 and p0340 in memory. Replaced crank sensor thinking it was cause of stall complaint. Could not get vehicle to learn crank varience properly. R... Trouble codes: P0340 (cam sensor)
2007 Chevrolet Colorado 2.9L radio VIN: 1GCC0158H4
I got a 2007 chevy colorado ls with a single cd player with theftlock, I need to remove the radio without interfering with the theft lock does anyone know how to remove this radio?
1997 Geo Metro LSi 1.3L No Start VIN: 2C1MR5299V
This metro was towed in - vehicle would start with startin g fluid , no fuel pressure , replace fuel pump , pressure good all the way to TBI-- spark still good and strong - very very weak injector impulse signal - removed and cleaned all ground wires , voltage...
1997 GMC Savana 3500 5.7L MIL Lamp on, VIN: 1GDHG31R3V
After replaceing manifold gasket MIL code P1345 came up and I have been unable to repair. Checked all wiring connection and dist. position. MIL light set instantly, but there is no drivability problem present. Runs well, with good acceleration, idle, and start... Trouble codes: P1345 (cranshaft position sensor-camshaft position sensor signal variation)
2003 GMC Sierra 1500 Denali 6.0L hydrualic VIN: 2GTFK69U13
thanks in advance to anyone who can help. i have this 03 denali that belongs to my boss. this vehicle was stolen and partially stripped.after the vehicle was recovered and sat(indoors) for about a year and a half my boss wanted to fix this truck.the missing bo...
2003 GMC Sierra 1500 SLE 4.3L starting, prndl VIN: 2GTEC19X73
Hi, this vehicle will sometimes start fine, intermitantly no start (i.e. no crank). No matter if it starts or not, the PRNDL does not read in park (actually the bar under the letter disappears). When vehicle does not crank, you have to cycle the key off & on a...
2000 Oldsmobile Bravada 4.3L power seat VIN: 1GHDT13W2Y
this is a bravada from a local car lot so i have no history.it has power and memory seat that works fine as long as you dont start car. it had u codes 1016 1041 and 1061 most on abs side clear codes and none returned.as i said seat works fine if you dont start...
2003 Oldsmobile Silhouette Premiere 3.4L master cyl VIN: 1GHDX03E13
This is the first Olds van that I have done. I am not sure what I am missing here. The vehicle came in with the symptom of a soft brake pedal. It needed front rotors and pads becuase they were all worn out. The rears were fine except where the brake fluid had ...
1995 Pontiac Grand Am SE 2.3L engine temp. VIN: 1G2NE15D5S
Had car come in last week for a tune-up, replaced plugs, plug boots, coil housing and coils. Checked compression at that time and was o.k. Noticed waterpump was leaking, so recomended. Came back, we put a waterpump, stat, reservoir cap and hoses on it. I also ...
1997 Pontiac Bonneville SE 3.8L Stall VIN: 1G2HX52K9V
The vehicle runs and drives with no problems, then just stalls. It does restart. The times between stalling can range from 1/2 hr to 4 hrs. We have replaced the cam sensor, dual crank sensor, fuel pump relay. Any help with this phantom problem will be apprecia... Trouble codes: P0135, P1106, P1406
2005 Pontiac G6 GT 3.5L Battery VIN: 1G2ZH54875
To GM tech. Battery drain occurs on this G6 Pontiac(125-130ma) only when I lock doors (with remote or doors switch). If I do not lock the doors, I got about 20 to 25 ma. battery drain. The problem is located at the IBCM 1 fuse. According to the wiring diagram,...
1998 Saturn SC2 1.9L Misfire, MIL Lamp on VIN: 1G8ZH1270W
This one's good. Have this problem car from another mechanic. The problem is a misfire in cylinder #2 only after the engine is loaded for 60 seconds or so. The misfire will come in gradually until it's a dead hole. And will stay misfiring until you let off the... Trouble codes: P0302

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue 3.8L Theft System VIN: 1G4CW524SH
Thanks to all who responded to my request. Some sugested the trunk was the problem. I unplugged the trunk tamper switch. The alarm still went off. Pluged the switch back in. Next I unpluged the switch in the drivers door. Alarm has not gone off. Customer has d...
1958 Chevrolet Corvette 283CID engine oil
I can wake up now because this nightmare is over.Everybody who replied was right.When confronted with a problem like this, get all the correct information.Heads were removed because of a valve problem.Heads had new guides & were machined to accept later model ...
2000 Chevrolet Impala 3.8L body control module VIN: 2G1WF55E1Y
Hello to all, I want to thank everyone who replied to my help request. The procedure for setting up a new BCM is to first go to ' Body control module' then 'special functions' then select 'Setup New BCM'. You then have to enter SDM part number and then select ...
2000 Chevrolet Blazer LS 4.3L 4 wheel drive
Thank You For All The Help. The Truck Is a 2000 Blazer With A 1999 4 wheel drive system. The Wiring Diagram was not right for a 2000 truck. I had to tell mitchell that it was 1999. to check for codes. this system does not have a self test for codes. You Need A...
2002 Chevrolet Suburban 1500 LT 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNFK16Z42
As it turns out this thing had a broken exhaust valve spring. I never did a compression test because it only had 67k on it, the only code was a P0300, and both banks were running very rich. Now had it had a P0303 or the fuel trim would have been out of whack o... Trouble codes: P0300 (Multiple cylinder misfire).
2004 Chevrolet Cavalier LS 2.2L Fuel Gauge VIN: 1G1JF52F54
Thank you for the 8 replies. We have ordered a Tech 2 and will get the vehicle back for diagnostic work, when it starts acting up again. Customer said that it is working normally most of the time. We have a different Cavalier that had the Speedo stuck at 5mph ...
2000 Pontiac Grand Am SE 3.4L plenum VIN: 1G2NF52E2Y
thanks for the replies, the fix was the injector rail was bent, i could [...] that the intake was done before on the car, i never suspected the rail because i never took it off the intake. but the more i looked at the original plenum i could see silicone on a c...
2002 Pontiac Sunfire SE 2.2L Poor Idle Quality, Surge, MIL Lamp on VIN: 1G2JB12472
After several hours of playing around and checking all suggestions, we finally got it to act up on a consistent basis. Even though we would wiggle wires, nothing was consistent. The IAC has a 4-wire pigtail harness with Coil A and Coil B low and high control w...
2003 Saturn L200 2.2L compressor VIN: 1G8JU54F33
Sorry I took so long to close this on out. I want to thank Tom, Chris, and Joe for telling me to reprogram by using the replace procedure. It didn't work though. Want I found out is if the calibration number has an * by it the module can't be programed. This m...
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