Checking/replacing cruise release switch - Chevy Impala SS Forum
 
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post #1 of 9 (permalink) Old 11-08-2015, 06:15 AM Thread Starter
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Checking/replacing cruise release switch

Running through the stepwise diagnostics of my cruise control, it looks like it's saying to check the release switch that is tucked way up under the dash. Has anyone experience removing it? It looks like there's a retainer that comes off too? Does it help to remove the stop lamp switch that's right below it? It is fastened to the brake pedal bracket the same way as the cruise release switch
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post #2 of 9 (permalink) Old 11-08-2015, 06:53 AM
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I think it should just pull out like brake light swtch
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post #3 of 9 (permalink) Old 11-08-2015, 07:30 AM Thread Starter
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I tried pulling on both switches. They seem locked in some way.
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post #4 of 9 (permalink) Old 11-08-2015, 10:37 AM
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Some ways are easy some are hard.

I find the easy way is to open the hood unplug the underhood cruise module and check the switch from the plug. This also checks the wire.

I do not like wasting time with the two screws and eight bolts to get to the switches then working under the dash.

If the switch is working why risk breaking it by removing it?

See your other thread: https://www.impalassforum.com/vBullet....php?t=1273681

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post #5 of 9 (permalink) Old 11-08-2015, 01:43 PM Thread Starter
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Quote:
Originally Posted by Z09B4U View Post
I find the easy way is to open the hood unplug the underhood cruise module and check the switch from the plug. This also checks the wire.

I do not like wasting time with the two screws and eight bolts to get to the switches then working under the dash.

If the switch is working why risk breaking it by removing it?
I hear you. I was mistaken earlier. I double checked the flowchart and everything checked out, down to the PCM connector B terminal 8 showing ~7 volts (actually was a bit high, but I think my voltmeter 'zero' is off.

The manual says if all that checks out to do that manual test of starting car, putting cruise into run position, then waiting three seconds, push set and R/A together and hold, while depressing and holding brake pedal for 10 seconds. Release brake pedal and see if RPM jumps slightly. Mine did not, so it looks like my cruise control module is toast. Suppose I could swap out the one in my 96RMW with the one in the 95 Impala, but pretty sure it is the module. Likely something in the solid state/integrated circuit board?

'95 DGM Impala SS, 383, LT4 cnc heads, LT4 matched intake, Holley 58 mm t/body, GM 846 cam, GMPP 1.5 rr's, F-body MAF, BH OBD I PCM, LT4 knock module, K&N cold air, Edelbrock headers, Flowmaster exhaust, BBHP #73 6-speed, 4:10 gear, sloted and drilled rotors, Z28 cluster.

'96 Buick Roadmaster Limited Wagon, mostly stock.

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post #6 of 9 (permalink) Old 11-08-2015, 04:52 PM
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Correct me if I am wrong?

I thought OBD I cruise and OBD II cruise systems are very different.

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post #7 of 9 (permalink) Old 11-08-2015, 04:58 PM Thread Starter
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You are right. The modules look very similar but the 94/95 are one part and the 96 is another. They are all discontinued and whatever is left some stupid ass wants $500 for. Screw that, I'm going to the yard later this week.
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post #8 of 9 (permalink) Old 11-08-2015, 11:22 PM
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Listening .

God Bless America!

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post #9 of 9 (permalink) Old 11-09-2015, 05:35 AM Thread Starter
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I'd bet there's some IC board in there that's identical between several GM vehicles. But not sure right now until I look.
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