'99 Cruise Control Issues...Module vs. Servo? - 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 04-16-2007, 11:52 AM   #1
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Default '99 Cruise Control Issues...Module vs. Servo?

Great site! wow, new member and i have tried to use other recent forums on this issue but gave up...ok Cruise control issue...'99, obvioulsy ther is no cruise control Servo,? Earlier post shows photos decribes location, etc...but I cant find because a '99 used the module, correct? Do these really go bad? thanks...
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Old 04-16-2007, 11:59 AM   #2
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You do have a cruise control servo. It is located next to the wiper motor on the firewall. If you follow the cables from the throttle body, one heads through the firewall to the accel pedal, the other is straight to the cruise servo/motor.

I would suggest testing the switch on the column, and servo both before replacing. Someone should be able to post the diagnosis for it.
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Old 04-16-2007, 12:08 PM   #3
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ok, one goes into the "electro motor cruise control" box mounted on the firewall and has a barcode and V6 on it...can that be openede and "cleaned"? I assumed that was all electonic....Yes, i will have the others items checked out but was attempting to do the basics first, THANK YOU for your reply...one other question, you appear to be the one to ask. You feel strongly about having the upper intake replace or check on these vheicles!? That bullitin was how I found this site.
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Old 04-16-2007, 12:13 PM   #4
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I'd consider it a sealed unit and probably find one at a JY if you can prove out the cruise servo is bad. Can't remember hearing of anyone having one go bad before.

On the upper manifold. We have a write in Techinfo under Mechanical (last on that page) regarding the issue with the upper intake manifolds. Also there is a stickey or two around regarding the UIM. Any other information you ever want to know, post up a seperate thread for it and Bob Dillion, Bill Buttermore and the rest of the group can answer it all.

I do recommend automatically changing the LIM gaskets when you change the UIM. GM now has a metal version out.
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Old 04-16-2007, 03:18 PM   #5
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This is a description of the system. It'* for a 2003, but basically the same thing. It will give you ideas on where to check. The brake switch is another possibility. The newer cars have a switch for the cruise control the is a separate from the brakes switch for the brake lights. They're both in the same general location, however. I don't know if yours is set up that way or not.

CRUISE CONTROL DESCRIPTION AND OPERATION
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Old 04-16-2007, 03:30 PM   #6
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Thanks, You know, I have been part of many car forums and car clubs over the years, but I must say... the knowledge and helpfulness (and I have looked through many subjects and post here) is unmatched! Perhaps its the kind of people who appreciate these "big cars" and the level of comfort and performance they provide. Again my thanks. Of course now I want an SEEi. WOW what a car it must be!
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