No overdrive in 99 Bonneville!! - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-10-2011, 06:32 PM   #21
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my rpms at 70 are exactally 3000 on level ground. I plan on pulling the pan and taking a look inside tonight to see what thats like. and of course a new filter. What u guys think about lucas additive? Just came from parts store and the guy behind the counter said his blazer wouldnt shift into od either before and he changed filter and threw some lucas in and it worked. Either he just got me to spend another 11 bucks or it might work. Remember, I'm not looking to make this my primary car, just a car to get to work and back about 24 miles one way.
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Old 12-19-2011, 07:16 PM   #22
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Did you ever find out what the problem was? My 94 Bonneville started doing the same thing this morning. Will not shift into overdrive, 3000 rpm at 70, no more cruise control.

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Old 12-19-2011, 08:07 PM   #23
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Have your car checked for codes. Your car may be a default mode that disables 4th gear and cruise control.
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Old 12-19-2011, 11:19 PM   #24
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I have the engine light on... I tried every code reader we have at work and none of them would read my 94 with what is apparently an OBDI computer with an OBD II connector.... any ideas on how to pull the code?
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Old 12-20-2011, 07:08 AM   #25
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You need to use a good quality scanner. The code reader may not be capable to read codes an OBD I car.
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Related Topics
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1994 Bonneville: NO reverse, 3rd or overdrive KeithH 1992-1999 0 07-11-2008 11:18 AM
Transmission issues 94 Bonneville SE 3800 with overdrive AFroedge 1992-1999 13 06-10-2007 09:32 AM
Went to store-had overdrive, coming back-NO OVERDRIVE Hafrod Buick 13 06-01-2006 10:44 PM
98 bonneville not shifting into overdrive. Cheerdad 1992-1999 3 01-04-2005 01:39 AM
overdrive or not to overdrive duffer26 1992-1999 10 03-13-2004 12:09 AM


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