Fuel guage issue

Asked by Jul 10, 2013 at 09:50 PM about the 2003 Pontiac Aztek STD

Question type: Maintenance & Repair

I have a 2003 Aztek, FWD, AT 250k miles... the fuel gauge is acting erratic, either way past full or empty, it matters not how much fuel is actually in the tank... so I popped for a new delphi fuel pump and sending unit ($300) and spent 8 hours wrestling the tank out, changing it and replacing the tank... turn the key and presto.... same problem, does anyone have a clue what I can "fix" next?

4 Answers

210

The Fuel Gauge / Temp Gauge went on my 2005 Aztec, The Temp gauge was not stepping down as it should,.. any how, the resolution was to have the entire cluster sent out to be rebuilt (no replacements are available).. I hope this helps.

8 of 8 people found this helpful.
210

There is yet one other possibility that I totally forgot about. There is a wiring connector that exits the passenger compartment right behind the diver's seat. Where it passes through the floor pan there is an electrical connector on the underside of the vehicle (C305). It is a 16 way connector. Some of the electrical circuits that pass through that connector are the AWD controls (i.e. might explain the AWD disable light) and the wheel speed sensors, fuel pump, EVAP controls, etc. What can happen is that water can get into that connector (had several owners here that had this issue - usually the symptom is erratic fuel gauge). The water can cause corrosion in the connector or up in the wiring itself. The wiring harness would need to be tested for continuity (capability of carrying electrical current at normal levels) and any water removed. This is just one other potential cause and certainly one worth looking at.

13 of 13 people found this helpful.
40

I agree with the cluster needing to be rebuilt. I had similar issues along with no odometer, erratic lighting issues, locks working and not. I had the cluster rebuilt and all seems to be cured. It seems the cluster problem caused the BCM to behave erratically.

4 of 4 people found this helpful.
20

I have a2001 Aztec the gas gauge wires run under the front seat,some times the pins inside the connector become dirty and have too be cleaned. If you trace the wires back you will find two connector some times come loose and need too be clean and pressed back together,if to loose you can put a rubber band around and pull it tight,these are located right under the rear seat of the four seated. Good luck

2 of 2 people found this helpful.

Your Answer

Aztek

Looking for a Used Aztek in your area?

CarGurus has 139 nationwide Aztek listings starting at $1,995.

ZIP:

Pontiac Aztek Experts

  • #1
    Tom Demyan
    Reputation
    320
  • #2
    ejhern
    Reputation
    210
  • #3
    Todd Smith
    Reputation
    140
View All

Related Models For Sale

Used Pontiac Vibe
28 Great Deals out of 1,041 listings starting at $988
Used Pontiac Firebird
9 Great Deals out of 781 listings starting at $2,500
Used Pontiac Grand Am
1,050 listings starting at $1,899
Used Pontiac Grand Prix
30 Great Deals out of 2,747 listings starting at $1,500
Used Buick Rendezvous
19 Great Deals out of 1,104 listings starting at $1,500
Used Ford Mustang
706 Great Deals out of 38,301 listings starting at $895
Used Pontiac GTO
12 Great Deals out of 473 listings starting at $5,995
Used Chevrolet Camaro
411 Great Deals out of 30,658 listings starting at $3,550
Used Honda Accord
1,103 Great Deals out of 61,486 listings starting at $999
Used Ford Explorer
831 Great Deals out of 63,128 listings starting at $1,000
Used Honda Civic
826 Great Deals out of 72,772 listings starting at $1,000
Used Ford F-150
2,315 Great Deals out of 182,094 listings starting at $1,000
Used Jeep Wrangler
294 Great Deals out of 16,176 listings starting at $2,500

Used Cars For Sale

2005 Pontiac Aztek STD For Sale
14 listings starting at $1,995

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.