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1999 GMC Sierra 1500
Worst 1999 Sierra 1500 engine Problems
Click on a problem below to read more.
- NHTSA: Engine And Engine Cooling2
- NHTSA: Engine And Engine Cooling: Engine1
- NHTSA: Engine And Engine Cooling: Engine: Gasoline1
- NHTSA: Vehicle Speed Control1
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Compare GMC Sierra 1500 Model Years
Curious how the 1999 Sierra 1500 compares to other years?
Check out our GMC Sierra 1500 overview to see the most problematic years, worst problems and most recently reported complaints with the Sierra 1500.