Cruise Control - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

View Poll Results: Cruise Control Problem...
Cruise Control Module 0 0%
Cruise Control Servo 4 66.67%
Toggle Switch on Steering Column 1 16.67%
CC Relay Replacement 1 16.67%
Voters: 6. You may not vote on this poll

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Old 06-03-2006, 11:56 PM   #21
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thanks willwren, but I just replaced the TPS, if anything is wrong with it now, i think i might have to shoot myself...

the update on this whole cruise problem, I just went a purchased a Cruise Control Servo at CheckerAuto.com....came to $80...i will re-update this thread when after I install it...and then we will know if that is the problem. I decided with the servo because of the poll...so if u guys are wrong then well, i dunno

interestingly enough i found out that the servo is the same one they used in like the 87-95 bonnevilles, cadillac devilles, park avenues, and a few others...so thats pretty cool..even though kinda insignifucant, i just thought I would mention that for future reference...

(Park Avenue = 1987-1990 Buick Electra then 1991-95 Park Avenue...same car...(Basically))
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Old 06-04-2006, 04:29 AM   #22
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darn, i just noticed that i'm not getting it till thursday!!! DANG!
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Old 06-04-2006, 12:17 PM   #23
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One of the things you needed to kinow is weather or not the ECM was seeing the request for Cruise... when you turn the switch on, the ECM will command the Cruise on... You will also be able to see the set speed if memory serves... I forget...

If the ECM does not see that you have turned on the switch then you will get no cruise...

At the same time the Brake switch is also part of the system, and a scantool will also give you info on that as well...

The TPS will be another...

All of these items go hand in hand...

Also I bought a Module from Advance once and it was by far the worst piece of crapp I ever bought... The calibration on those units is horrible...

And I have almost never seen those Modules fail

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Old 06-08-2006, 11:43 PM   #24
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Quote:
Originally Posted by jr's3800
One of the things you needed to kinow is weather or not the ECM was seeing the request for Cruise... when you turn the switch on, the ECM will command the Cruise on... You will also be able to see the set speed if memory serves... I forget...

If the ECM does not see that you have turned on the switch then you will get no cruise...

At the same time the Brake switch is also part of the system, and a scantool will also give you info on that as well...

The TPS will be another...

All of these items go hand in hand...

Also I bought a Module from Advance once and it was by far the worst piece of crapp I ever bought... The calibration on those units is horrible...

And I have almost never seen those Modules fail
Thanks Don,
I appreciate those tips.

Ok guys, need help here. I just installed the Cruise Servo. WELL, it turns out that was definitely not it. So then we have narrowed it down to the brake switch, cruise switch, or the cruise module. So i guess i will return the servo...

So guys, what is the next thing i should try..besides of course using a scantool....? the switch, the module or the brake switch? HELP!
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Old 06-09-2006, 12:25 AM   #25
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That'* really a tricky one. Was it really a problem on the bonne'*? My '87 worked perfectly and that was with 205k on the clock. Maybe i got lucky.
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Old 06-09-2006, 02:25 AM   #26
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you know what, its funny, but i think it was a different system. Because my friend had an 87 with 294k and HIS CRUISE CONTROL WORKED! It is off...they did something right...

Does anyone know the part numbers for a brake cruise switch and what is the part number for the complete multifunction stick or whatever they called it. Please...part numbers.
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Old 06-09-2006, 11:27 AM   #27
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i really need to know what to replace next to bump
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Old 06-09-2006, 12:33 PM   #28
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The cruise servo you replaced was the Cruise Module...

The cruise is controled by the ECM...

You almost have to have a scantool to know which one is really bad...

Does the TCC lock up on your car? When you tap the brake do you get a bump from the trans as the TCC unlocks..

Its tuff to say exactly whats causing the problem... It could be any of the listed items... It could even be the ECM.... But I still feel you need to know what the ECM is seeing so you may have an idea as to why the cruise is not functional...

And the cruise for the 87 Bonnie should be the same as the cruise for an 88-95 Bonnie... 96 went to the newer style

Also have you checked all of the Vacume lines running to and from the Cruise Module? As well as from the engine to the Module? I have seen these go bad and collapse leaving the cruise inop

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Old 06-09-2006, 12:37 PM   #29
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well actually i think there is a cruise module because there is one for sale or checker auto....

ok well i will be borrowing a scantool pretty soon and i just bought a FSM so i guess this will be dignosed soon...

but if anyone thinks of ANYTHING!
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Old 06-15-2006, 10:14 PM   #30
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ok guys...here it is...

just scantooled it...it is not seeing the request...period...so, does that mean i have a bad switch, or does that mean i have a bad CCM? I will be going to a jy soon to see if i can fish one out...but i really want to know whether it is the CCM or the CC Switch...
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