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shift position indicator and reverse light issues

electronic shift position indicator not accurate reverse light not working correctly

shift position indicator and reverse light issues

Postby Bootknocker [OP] » Jul 06 2012, 11:16pm

The vehicle I am having issues with is a 2001 Silverado 1500 LT 5.3L 4x4.

The first issue is that the electronic shift position indicator in the instrument panel cluster is not accurately changing when I'm shifting. For example, I will shift from Park to Drive and the display will stay on P or move to N, then when I begin to drive the display will change from P or N to D. This happens in a lot of different variations, like when I go from D to R the display will stay on D or go to N while reversing. The display always eventually changes to the correct position but usually only after I start moving.

The other problem I'm having which seems like it may be related is that my reverse lights only come on when I go from N,D to R. If I go from P to R the reverse lights never come on. I am always forced to shift into N then R to get my reverse lights. This method works every time, but it's not ideal.

So far I have cleaned and inspected all connections around the PNP switch which all appear to be in good working order. Next step is to replace the PNP switch, but I'd like to know if that's the cause before I do.

Any help or advice is appreciated.
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shift position indicator and reverse light issues

Postby Machster69 » Jul 06 2012, 11:27pm

Did you inspect the solders on the back of that circuit for the display, common for them to crack. Might explain why moving makes the connection... Ide at least inspect them and reheat any that look bad before dumping $ on it.... Its only a few minutes to get the cluster out, the cluster rear cover, then the display... Dont break any steppers while in there ;)
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Re: shift position indicator and reverse light issues

Postby SilverSurfer » Jul 09 2012, 5:01am

I'd agree except that your reverse lights are acting up. Do you have a test light? I'd test that pnp switch before replacing it.

You said that when you shift from D to R, eventually it shows R. Do the backup lights come on then?
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Re: shift position indicator and reverse light issues

Postby Bootknocker [OP] » Jul 09 2012, 6:51am

@Machster69 - Checked it out and everything looks good

@SilverSurfer - No they still don't come on, they only come on when shifting from below R (N-1) up to R. Going from D to R the reverse lights never come on.
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Re: shift position indicator and reverse light issues

Postby SilverSurfer » Jul 09 2012, 7:33am

pnp then. Test light time.
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Re: shift position indicator and reverse light issues

Postby Bootknocker [OP] » Jul 09 2012, 7:47am

Thank you, I had a feeling.
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Re: shift position indicator and reverse light issues

Postby SilverSurfer » Jul 10 2012, 3:31am

np, test it first
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