Truck won't start after pressure washing the engine bay please help

Asked by Apr 14, 2017 at 12:02 AM about the 1998 GMC Sierra 1500

Question type: Maintenance & Repair

I lightly pressure washed the engine bay of my
truck and ever since then the truck will crank but
not fire up.The truck ran flawless before this
happened.please help

4 Answers

10

It's possible a sensor has been affected because of the water seeping into the area where it connects with to a plug / terminal. I would give it a day to fully dry out, especially if you can let the sun shine on the engine bay. If it still wont start, make sure the connections didn't loosen and cause a weak connection. If you STILL have issues you may have to take it to a shop. In the future wrap any and all sensors, connectors etc.... with plastic and tape them of tight.

2 people found this helpful.

I unplugged the spark plugs and let it dry for about two days replaced the bad battery and today it fired up first crank.I warmed it up then drove it ten minutes and shut it off.Came back a few hours later It cranked but would not fire up.Do you have any other information on this? Thank you

No check engine lights or any others while I had it running. The engine is in great condition leaks no fliuds or anything of that nature everything is connected .

We believe it could possibly be the alternator or the starter.Mainly because the alternator did get sprayed once directly.Any thoughts?

Your Answer:

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 9,455 nationwide Sierra 1500 listings starting at $4,595.

Postal Code:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    6,180
  • #2
    John Edward
    Reputation
    4,820
  • #3
    Glenn Clingenpeel
    Reputation
    4,290
View All

Related Models For Sale

Used Chevrolet Silverado 1500
63 Great Deals out of 10,312 listings starting at $4,750
Used Ford F-150
141 Great Deals out of 10,248 listings starting at $2,000
Used Chevrolet Silverado 2500HD
12 Great Deals out of 1,645 listings starting at $5,950
Used Dodge Ram 1500
11 Great Deals out of 397 listings starting at $4,900
Used GMC Yukon
15 Great Deals out of 1,354 listings starting at $3,995
Used Toyota Tacoma
24 Great Deals out of 1,814 listings starting at $5,999
Used Ford F-250 Super Duty
9 Great Deals out of 777 listings starting at $5,995
Used Chevrolet Tahoe
11 Great Deals out of 1,307 listings starting at $3,690
Used Chevrolet Camaro
8 Great Deals out of 1,046 listings starting at $10,995
Used Jeep Grand Cherokee
47 Great Deals out of 4,888 listings starting at $3,499

Used Cars for Sale

2019 GMC Sierra 1500 For Sale
4 Great Deals out of 5,947 listings starting at $29,980
2018 GMC Sierra 1500 For Sale
6 Great Deals out of 1,661 listings starting at $25,988
2017 GMC Sierra 1500 For Sale
11 Great Deals out of 468 listings starting at $24,700
2016 GMC Sierra 1500 For Sale
8 Great Deals out of 275 listings starting at $16,995
2015 GMC Sierra 1500 For Sale
10 Great Deals out of 356 listings starting at $18,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.