10.0

really awful
Typical Repair Cost:
No data
Average Mileage:
78,000 miles
Total Complaints:
1 complaints

Most common solutions:

  1. not sure (1 reports)
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problem #1

Nov 032005

(reported on)

DeVille 2dr Coupe 4.1L V9 EFI

  • Automatic transmission
  • 78,000 miles

Bought from orig. owner @ 58,000 & now has 78,000. He confirmed GM's mpg @ 17/25; now getting 10mpg. Care since 58k: plugs, wires & fluid changes. One-month ago a not so credible mech installed an EGR following his instruction to troubleshoot excessive fuel: Car began missing, making popping noise; failed to down-shift into passing gear. Alternator replaced last wk: Mech re-set timing and claimed the duel TBI's need pro-cleaning or replaced. Has new muffler & catalytic converter checks out good. Car still missing, popping & using far too much fuel.

- bugular12344, Haltom City, TX, US