help my 99 sle - 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 11-26-2008, 03:26 PM   #1
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having a few problems with my 99 sle fan stoped working in high mode and had been working in the 3 lower speeds ...now it still works in the 3 lower speeds but sometimes wont work at allany ideas ?
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Old 11-26-2008, 03:27 PM   #2
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please help me comunicate with others on this page need help with my 99 bonne
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Old 11-26-2008, 04:13 PM   #3
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You may have a relay that is failing. Not sure though. Would be something to check until someone more knowledgeable got here.
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Old 11-26-2008, 04:24 PM   #4
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thanks have a check engine lig now ....ahd coil pack go last month but i dont know if its another ?/////////////
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Old 11-26-2008, 05:51 PM   #5
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Can you get that code scanned? That will help us fix that problem atleast.
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Old 11-26-2008, 07:33 PM   #6
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got code 303 then changed plug and wire for # 3 code 303 still comes up even after it was reset miss fire still there
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Old 11-26-2008, 07:55 PM   #7
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Pull all your plugs and inspect them. Look for fowling. Check all wires and make sure they are seated correctly. Check your coils to make sure they look ok. May I ask why your just checking #3? Keep in mind the coils fire 2 plugs each. So check that mate to that plug as well.
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