GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Page 1 of 2 12 Last Post byLast Post by
Results 1 to 10 of 11
  1. #1

    Default Suburban Ignition Switch/Instrument Cluster Problem?

    2002 Suburban 2500 / 4x4 / 8.1L
    84k miles

    Suburban dash gauges all die at once, then come back on, with entire dash lighting up (like when you first start vehicle), then goes back to normal. It did this two days ago at low speed (25 mph) on smooth road. Then I drive for 50 miles with no problems. Did it again yesterday on smooth road but at 45 mph, but then engine revs, and it appears transmission is stuck in second (drive selector is in “D.”) May have done they tranny downshift two days ago when dash gauges died, but I just didn't notice it since that was at low speed? Drove today with no problems.

    Advice/comments so far from others include:

    1) Bad ignition switch. Power to the IP goes through it, that's why the intermittent failure. The PCM power also goes through the switch, thats why the trans gets stuck in 2nd or 3rd gear...the failsafe mode. May or may not set any codes. 2002 was good for that. and

    2) Or possibly a loose connection at cluster or anywhere from its feed or ground. Agreed response 1 above is more than likly right on the money.

    Hard to solve when you can't duplicate at mechanic's shop.

    Any ideas??

    Thanks!!

  2. #2

    Default

    You should be able to diagnose the ignition swtich issue by starting the vehicle, then shaking and jiggling the key in the ignition. Messing with it in this manner should reproduce the problem. If this doesn't do it, then I'm going to guess it isn't the ignition. It could be a ground issue, like the main ground going to the battery is loose, damaged, or insufficient for the vehicle. Have you added any aftermarket power-eating goodies into the vehicle before this started occuring? (car audio, lights, winch, etc)
    Christopher

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 200K miles
    2005 Saturn ION-2 Stock 265K miles
    1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half



    There are 10 kinds of people, those who understand binary, and those who dont...

    Remember kids, the only difference between screwing around and science is writing it down- Adam Savage

  3. #3

    Default

    Thanks for the quick response!

    You response with My comments in *****

    You should be able to diagnose the ignition swtich issue by starting the vehicle, then shaking and jiggling the key in the ignition. Messing with it in this manner should reproduce the problem. If this doesn't do it, then I'm going to guess it isn't the ignition.
    ****** Did that this morning and could not get it to fail.

    It could be a ground issue, like the main ground going to the battery is loose, damaged, or insufficient for the vehicle.
    *******Pulled batt cables and cleaned them off yesterday, then it failed 15 mins later.

    Have you added any aftermarket power-eating goodies into the vehicle before this started occuring? (car audio, lights, winch, etc)
    ****** Bought used Oct'04 from original dealer who sold it to guy who was now trading it. (Yea, he ate a ton of depreciation) Original owner had aftermarket DVD Player installed with twin fold down screens and two power inverters and AV outlets to add video games, etc. so you can do two sepearte things on each screen (TV, DVD, or whatever you want to connect to the AV outlets.) It was profesionally installed and looked stock. We only use when on trips, and for the 3+ years we have owned it, we have not had any electrical issues. Has a master cut off switch in front and that stays off. It's one of those things I would have never bought/paid for myself, but it was perfect vehicle for us as we wanted and SUV (nd not PU) to tow a 33', 9k Travel Trailer, and this Burb is a 2500 and has the big block for 10k+ towing and at a good price. Thanks

  4. #4

    Default Suburban Ignition Switch/Instrument Cluster Problem?

    I had the exact same combination of problems with my 95 Suburban. Intermittently, the instrument cluster lights went out - specifically the PRNDL gear indicator light (the dealer referred to it as IPC and the "PRINDLE") and the transmission felt like it was stuck in 2nd/3rd gear.

    Replacing the ignition switch solved these problems it has been 3-4 months without incident. It cost me 218.22 in parts and 309.45 in labor to get it fixed at the dealer.

  5. #5

    Default

    Check for a bad or broken ground wire from the engine to the firewall, or frame rail.

    We have a lot of ground problems with our Fieros and this sounds like the same problem.

    Technology is great, when it Works,
    And one Big Pain in the Ass When it Doesn’t.
    Detroit Iron Rules, All the Rest are Just Toys.
    94 GMC Burban, 5.7L (350), 4X4, Auto
    86 GMC Burban, 350, 2 WD, Auto
    79 GMC pickup plow truck, 400, Full time 4X4, Auto
    86 Pontiac Fiero SE, 2.8L, Auto, only mid engine American car
    See a Pattern yet?

    15 year GM assembly line worker.

  6. #6

    Thumbs up Fixed

    Thanks for all the posts. Replaced ignition switch, and no problems. JAL

  7. #7

    Default

    I had this problem with my '02 Suburban. I have the service manual on DVD and it includes the TSBs and it turns out that there is a TSB for this problem. In my suburban, it started out that I would have all the gauges drop out and other dash lights (like ABS, CEL) would come on. This would happen from time to time while driving. More recently, all this would happen every time I started the vehicle but I could get it to come on with a firm tap on the end of the key. If I just drove it with the disabled gauges, it seemed like it was in limp mode because it was starting in 2nd or 3rd gear.

    The service manual instructions for the replacement of the ignition switch are fairly good with a couple of exceptions. The airbag module removal procedure is a bit difficult if you don't know what you are trying to do when you are releasing it from the steering wheel - it's a blind operation, all by feel with a flat bladed screwdriver. Once you see a steering wheel with the airbag removed, you can see what is going on. Look for a YouTube video on Satruns by a guy named richpin for a good tutorial on this.

    The only other thing that was tricky is a connector that sits above the ignition lock cylinder. The service manual talks about rotating it 90 degrees clockwise before lifting it out. However, it doesn't want to rotate freely because there is a hidden lock tab on the back side of this connector (furthest away from the location where the key is inserted). If you break this connector taking it out it's no big deal because the replacement switch has a new one so if you can't release the hidden tab, no worries.

    The service manual lists a special tool for removing the switch. It is not needed. If you pull down on the switch while inserting a screwdriver in the holes where the switch tabs lock it in place, it releases pretty easily. No need to insert two screwdrivers simultaneously - if you pull down and release them separately, they should not lock back in place.

    The other thing to be aware of is the indexing of the gear in the ignition switch. Being an inquisitive person, I fiddlled with this gear after removing the switch without first noting the position of the gear. Make sure you note the correct position of the gear before doing any "fiddling" so you can set it properly on the replacement switch before attaching it.

    One other thing - there is a metal "shroud" around the steering column under the knee bolster panel held on by four bolts. I don't think the service manual mentioned taking this off but it is easily removed and makes access to the wire harnesses much easier so just take it off after removing the bolster.

    Also note that there is a 14 pin and a 10 pin variant of this switch. You don't really know which one you need until you get the old one off. To determine this, count the number of actual connectors on the big plug that bolts on under the dash. Mine had 14.

    The TSB for this is: Malfunction Indicator Lamp (MIL) On, Transmission Stuck in Second or Third Gear, Instrumend Cluster Inoperative (Replace Ignition Switch) #01-07-30-002D - (Oct 19, 2004)

    Last edited by IrishBrewer; 06-07-2009 at 10:56 AM. Reason: Link to TSB

  8. #8

    Default

    Can you recommend a good source for an ignition switch? I found a couple with a Google search, but I'm less than convinced that they'll actually be the right part (and I don't want to wait until I have everything apart to find out).

    Thanks,
    Kevin

  9. #9

    Default

    Quote Originally Posted by kbroderick View Post
    Can you recommend a good source for an ignition switch? I found a couple with a Google search, but I'm less than convinced that they'll actually be the right part (and I don't want to wait until I have everything apart to find out).

    Thanks,
    Kevin
    Kevin.....in order for Us (Members) to help you, What Year and Model is your Vehicle??


    Also, by chance did you notice that this Thread is over 2 yrs Old??

    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  10. #10

    Default

    Quote Originally Posted by 99'HEARTBEAT View Post
    Kevin.....in order for Us (Members) to help you, What Year and Model is your Vehicle??


    2002 Suburban 1500 LT 4wd, Flex Fuel

    Quote Originally Posted by 99'HEARTBEAT View Post
    Also, by chance did you notice that this Thread is over 2 yrs Old??
    I did, but I'm about 90% sure it's the same problem, so I didn't want to create a new thread.

Page 1 of 2 12 Last Post byLast Post by

Similar Threads

  1. 2002 Silverado 3500 Instrument Cluster Problem
    By davmaj2 in forum General Chevy & GM Tech Questions
    Replies: 2
    Last: 06-01-2010, 04:01 PM
  2. 92 suburban won't start- ignition problem?
    By vintage_car in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 3
    Last: 04-18-2010, 08:09 AM
  3. 2003 Suburban Instrument Cluster
    By moondog84 in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 13
    Last: 12-08-2009, 09:49 PM
  4. Suburban Instrument Cluster
    By medicjack in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 3
    Last: 10-16-2009, 12:22 AM
  5. instrument cluster problem
    By tekniq in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 1
    Last: 02-07-2007, 08:37 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •