Question about 1999 Pontiac Grand Prix

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I need asistance on my caris 1999pontiac grand prix after repl tcc sensor my trans cover start to leak by axle area remove cover and reinstall oring seal trans cover so far ok my trans work good but air bag lite is no wath i do wrong lite flashes 3 times and stay on ll the time

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  • leonel alvarado Nov 15, 2009

    When I reinstall the trans cover and the subfrem does it steering shaft disconnect from rack and pinion, after that my airbag light comes on. This is the problem I create when I remove the subframe. I need an answer for that problem. Thank you.

  • leonel alvarado Nov 19, 2009

    Thank you very much you are very helpful

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. Check the ground to the left of the steering column.

2. Monitor voltage on the turn signal fuse in the fuse block and Powertrain Control Module (PCM) fuse when acts up.

3. If getting voltage drop at fuses, check power in and out of the ignition switch and replace the ignition switch.


1. Disconnect the Yellow connector at the base of the steering column and install the load tool.

2. Turn the key on and check for the code.

3. If the load tool is not available, install a resistance value of 2.5 ohms and turn the key on.

4. If the code is gone, reconnect the connector at the base of the column and repeat the load tool/2.5 ohm resistor at the top of the steering column (air bag connection).

5. If the code does not clear, replace the clock spring.

Posted on Nov 15, 2009

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The air light bag is likely a sensor. Run code diagnostics and it should identify which one is the culprit. Unless something done during the tranny work caused a power issue, this is likely a coincidence. But check the codes and you should be able to identify...Good Luck. I hope you find this very helpful.

Posted on Nov 15, 2009

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2 Answers

Grand prix dies when put in gear


Could be crankshaft position sensor ! Had same problem on a customer's Buick Century , 3.1 L V-6 , This engine has two crankshaft position sensors . Could be a 3.4 l or 3.8 l as well ! What year Grand Prix ?

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sounds like a tcc issue in the transmission. some times it can be fixed with an ecm flash. often it is a bad tcc solenoid inside the trans. valve body.

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Transmission cover removal to fix code p2761


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Apr 14, 2014 | 2006 Pontiac Grand Prix

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My 2006 pontaic grand prix begins to shift very hard after a long drive (over 50miles) What could be the problem. I checked the fluid and it appears to be clean and full.


It sounds like the coils on your TCC (Torque Converter Lock-up) are starting to wear out. The TCC solenoid is a common problem with the GM Transmissions. They normally start to show signs of wear around 75,000 miles but I have seen them go bad as soon as 32,000 in high temperature areas.

One of the best things you can do with your Transmission is to add an External Transmission cooler. This will extend the life of your transmission by YEARS,,,

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I have a 2000 pontiac grand prix supercharge that i just got out of the shop 2 days ago.Had a different engine installed cuz other blew. The service engine soon likght came back on all ready .I did the...


P0420 means catalyst sytem efficiency below threshold (bank 1). the catalytic converter has an oxygen sensor in front and behind it. this code basically means a converter is not working as efficiently as it should be. it is part of your emissions system. this can be caused by multiple issues. and oxygen sensor is not reading properly, the engine coolant sensor is not reading properly, you may have a damaged or leaking exhaust manifold-catalytic converter-or exhaust pipe, ect. so check the exhaust manifold, catalytic converter, and pipes for leaks. check out the oxygen sensor with a scope; the sensor infront of the catalytic converter usually has a fluctuating waveform, the waveform behind the converter should be more steady. check out the downstream heated oxygen sensor and if its bad replace it. or replace the catalytic converter.

P0741 has to do with your trasmission control clutch.Majority of the time, it is a torque converter clutch solenoid. This solenoid controls the hydraulic pressure to both apply and disengage the torque converter. When it is applied/engaged, you should see no (or minimal) TCC slip speed. if the PCM commands the TCC on (apply/engage), and it detects a high level of "slip", P0741 is the result. i would say to take it to your favorite/most trusted trans shop. It's internal, the trans needs to be dropped, the side cover needs to be removed, and I believe the trans oil pump may need to be removed in order to get access to it. If not the TCC solenoid, it can also be the turbine shaft seals on the oil pump. But still no easier to fix.

P0440 is evaporative emission control system malfunction. most common cause of this problem is the fuel cap. the fuel cap may just be loose or the gasket isnt sealing. take it off and just check out the gasket. if thats the problem, try a little silicone spray on that rubber gasket then put the fuel cap on and turn it 4 to 6 clicks. or the grommet around the PVC valve may be loose in which case you should replace it.

i know thats alot of information at once but hopefully that helps you out a little.

Jan 06, 2011 | 2000 Pontiac Grand Prix

1 Answer

How do you remove a front cv axle?


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1 Answer

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1 Answer

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Mar 23, 2010 | 2001 Pontiac Grand Prix

1 Answer

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1 Answer

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