Electric dash, BCM problems in my '90 Riviera

Asked by Jun 01, 2012 at 03:12 PM about the 1990 Buick Riviera STD Coupe

Question type: Maintenance & Repair

I'm stuck. The electronic dash goes haywire on my Riviera. The temp gauge goes out, then the tachometer, then the cruise control and air conditioner, then the whole dash reads Error, the speedometer either reads 158 mph or 00, and the Service Engine and Electronic Malfunction light come on. I took the car to several Buick dealers; all but one said they couldn't help me. One dealer gave it a try. After having the car for a week, they said the power module was shorting and messing up the BCM, and GM doesn't make those anymore. I found used replacements online, and the dealer has had my car for another week. They installed the used power module and BCM, but this time everything went off after about 2 minutes. The service manager said they had no way of programming the BCM, and it may be the ECM that's the problem, but they don't know how to find that out.

Does anyone have any experience with this computer equipment from the 1990 model year, and know what to do?

This car is in great shape. Hate to give it up for something like this.

Thank you!

2 Answers

25

hi i have a 1986 buick riviera i had the same problem a while ago. i found that it was the connection of the (cpu) central power supply. hope this helps lloyd

2 of 2 people found this helpful.

Lloyd, Thanks for your response! I've forwarded your answer to the dealer's service manager to check out.

Your Answer

Buick Riviera Experts

  • #1
    Alvin1966
    Reputation
    1,090
  • #2
    Chris Kelley
    Reputation
    550
  • #3
    Jason Zane
    Reputation
    410
View All

Related Models For Sale

Used Buick Regal
156 Great Deals out of 9,804 listings starting at $999
Used Chevrolet Camaro
434 Great Deals out of 31,716 listings starting at $2,395
Used Cadillac Eldorado
369 listings starting at $2,300
Used Buick LeSabre
20 Great Deals out of 1,888 listings starting at $1,588
Used Buick Park Avenue
416 listings starting at $1,800
Used Ford Mustang
760 Great Deals out of 41,952 listings starting at $1,300
Used Chevrolet Corvette
291 Great Deals out of 22,020 listings starting at $2,500
Used Buick Skylark
81 listings
Used Chevrolet Caprice
184 listings starting at $34,100
Used Cadillac Seville
327 listings starting at $2,500
Used Ford Thunderbird
16 Great Deals out of 1,107 listings starting at $6,950
Used Ford F-150
2,170 Great Deals out of 181,253 listings starting at $1,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.