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  1. Chevy Suburban Forum (GMC Yukon XL)
    So here is the deal: -LOUD popping noise during start, especially after sitting for awhile, especially during hot weather (pops once before it cranks). Long starting, works every time but sometimes takes several attempts before turning over. Backfiring noises during acceleration. -Way less...
  2. Chevy Suburban Forum (GMC Yukon XL)
    I have a 1998 Chevrolet Suburban 5.7 vortec engine at 299000 miles. Yesterday I accidentally put in 93 gas instead of the recommended 87( not sure if this fact is related to the problem). The very next day, it suddenly cut off while driving down the hwy. I pulled over to try and restart it, it...
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