Water incursion GMC Envoy

The plugs were part of the $1,000 repair along with oil change and gas filter. I am a little nervous about changing the fuel filter because the last time it was done, the connection broke lose 45 days later. A big truck stopped my wife on the highway an said lady, you’re spilling gas all over the road. The Envoy was towed back to the dealer who said he didn’t do anything wrong, and I called GM who said nothing is wrong with part, the usual deny deny deny! I am sure glad it didn’t break while in my garage.