I have a 2005 3/4 ton suburban and when I try to switch into anything but 2WD the light flashes and then nothing happens or it gives me the blinking red light on the selector panel. Any thoughts.

Asked by ES4x4bad Jan 09, 2013 at 08:02 PM about the 2005 Chevrolet Suburban 2500 LT 4WD

Question type: Maintenance & Repair

After pushing any 4WD button (4WD auto, 4WDH or 4WDL) the light just blinks and either goes back to 2WD or gives me the red light in the neutral field. I get no service errors just wont engage.

3 Answers

6,450

Theres a problem with the 4WD system. Likely errors are the transfer case motor, a broken or disconnected vacuum line, or the front axle vacuum acuator.

4,935

I agree it is most likely the front differential actuator motor or the encoder motor or switch. NOTE:......With a standard OBD II code reader you unfortunately will not be able to pull service error / diagnostics codes from the BCM, transfer case 4x4 etc. GM requires that you have a much more sophisticated AND expensive OBD II reader called Tech II, or you can purchase a less expensive version that is called an ENHANCED OBD II code reader.

Your Answer:

Suburban

Looking for a Used Suburban in your area?

CarGurus has 550 nationwide Suburban listings starting at $7,500.

Postal Code:

CarGurus Experts

  • #1
    Andrew Olsen
    Reputation
    3,090
  • #2
    JimO65
    Reputation
    2,400
  • #3
    Rowefast
    Reputation
    2,150
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Yukon XL
14 Great Deals out of 683 listings starting at $13,950
Used Chevrolet Tahoe
24 Great Deals out of 911 listings starting at $11,900
Used Ford Expedition
23 Great Deals out of 821 listings starting at $7,888
Used GMC Yukon
16 Great Deals out of 929 listings starting at $1,225
Used Cadillac Escalade ESV
6 Great Deals out of 128 listings starting at $12,995
Used Cadillac Escalade
21 Great Deals out of 376 listings starting at $6,900
Used Chevrolet Silverado 1500
202 Great Deals out of 5,975 listings starting at $2,975
Used Lincoln Navigator
10 Great Deals out of 172 listings starting at $9,869
Used Toyota Sequoia
4 Great Deals out of 69 listings starting at $16,489
Used Ford F-150
321 Great Deals out of 14,968 listings starting at $1,712
Used Chevrolet Silverado 2500HD
16 Great Deals out of 1,285 listings starting at $8,995
Used GMC Sierra 1500
148 Great Deals out of 7,258 listings starting at $3,950
Used Toyota 4Runner
10 Great Deals out of 304 listings starting at $9,700
Used Toyota Sienna
40 Great Deals out of 750 listings starting at $4,200

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. Content will be removed if CarGurus becomes aware that it violates our policies.