GMC Denali
exhaust system Problems
We don't have a lot of GMC Denali exhaust system problems on file — feel free to add yours here. The most common Denali exhaust system problems cost $100 to fix & occur at 61,000 miles.
The worst model years for exhaust system problems are the 2021 Denali, and the 2019 Denali.
Worst GMC Denali Exhaust System Problems
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#1: Exhaust Cleaning Frequent 2019 Denali
- Average Cost to Fix:
- N/A
- Average Mileage:
- 0 mi
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#2: Service Engine Light Code #P1478 2021 Denali
- Average Cost to Fix:
- $100
- Average Mileage:
- 122,000 mi