I have a 2005 Chevy 1500 Silverado, 5.3 Flex. 20,000 miles.About two months ago, my check engine light came on. Went to the parts store and found out it was the mass air sensor, and changed it out with exact OEM part. The truck still struggles going uphill, trans seems to be shifting properly. Could it be another sensor, gas filter, etc? It just seems the engine is struggling. I have always used pure gasoline, not flex fuel.

120

Asked by Feb 23, 2013 at 02:49 PM about the 2005 Chevrolet Silverado 1500

Question type: Maintenance & Repair

11 Answers

246,955

Is your check engine light still on? Sometime those codes pinpoint which sensor is detecting the problem, but it isn't always that sensor. Did you clear the code after reinstall or disconnect the battery to clear everything? When replacing sensors it's always good to remove the negative battery cable to clear the memory. You also could have some misfires, meaning you need to replace a coil. Give us some more details.

2 of 2 people found this helpful.

whatever caused the MAF to stop responding (these have rare earth metals, and are pricey) the first fail also was the reason for the second fail. The egr should divert air on a circuit that the MAF doesn't see....perhaps some stuck or disconnected bit of hose plumbing is causing failures. things do not seem right in denmark, for something that's so new. Must be something really small and silly!

1 of 1 people found this helpful.

the beloved EGR is cause for unseen badness in performance-

120

The check engine light is off, never came on again. I haven't disconnected the battery to reset. I was on rough rocky road a week before this started. The connector to the MAS was tight. It doesn't feel like I have a mis, no rough running. Bob, that's what I was thinking, something is disconnected. I looked but can't see anything. I'll give it another try and disconneted the battery. Any suggestions where to look, vacuum line, connector?

3 of 3 people found this helpful.

look for a diconnected vacuum line, this would explain everything~

2 of 2 people found this helpful.

look for something that isn't working right. test stuff if you can by removing to see if vacuum or pressure IS on the spot, or get one of these suction/gauge devices where you can apply suction to see if a device is doing it's job...these are quite useful- but the check engine light will reveal what needs attention. You could go at it "commando" and test everything like a madman, but it's best to have a little intelligence behind your tests- I can look to see your vacuum diagram to make an educated guess-

god forbid a choked catalytic converter...now why might this happen? Something in the computer told it to run rich, and now we've got a hot converter because some of the energy of the gasoline is firing off in your exhaust, in the Catalytic converter! gotta make it run right before replacing the cat or we'll have deja vu all over again!

120

No funny smell from exhaust, starts great also. I'm going to change the gas filter and take a run up to the mountains and if that fixes it.

1 of 1 people found this helpful.

yay!

120

I guess the gas filter for my truck is in the gas tank?

1 of 1 people found this helpful.

probably a small can with nipples at both ends. 'bout 3 1/2" lg.

Your Answer

Add photo

Related Questions

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 182,420 nationwide Silverado 1500 listings starting at $1,595.

ZIP:

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 2,440
#2 Rowefast
Rowefast
Reputation 1,950
#3 tenspeed
tenspeed
Reputation 1,650
View All

Related Models For Sale

Used GMC Sierra 1500
768 Great Deals out of 68,175 listings starting at $1,700
Used Ford F-150
2,109 Great Deals out of 192,316 listings starting at $290
Used Dodge Ram 1500
403 Great Deals out of 10,913 listings starting at $1,000
Used Chevrolet Silverado 2500HD
310 Great Deals out of 28,474 listings starting at $990
Used Toyota Tundra
415 Great Deals out of 34,384 listings starting at $2,500
Used Toyota Tacoma
549 Great Deals out of 42,549 listings starting at $1,995
Used Chevrolet Tahoe
637 Great Deals out of 32,888 listings starting at $1,500
Used Chevrolet Colorado
245 Great Deals out of 27,383 listings starting at $1,000
Used Ford F-250 Super Duty
315 Great Deals out of 44,125 listings starting at $1,450
Used Chevrolet Silverado 2500
8 Great Deals out of 259 listings starting at $3,495
Used Chevrolet Silverado 1500HD
12 Great Deals out of 276 listings starting at $3,800
Used Dodge Charger
529 Great Deals out of 28,513 listings starting at $2,500
Used Ford Mustang
706 Great Deals out of 44,429 listings starting at $1,500

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
295 Great Deals out of 126,411 listings starting at $15,892
2016 Chevrolet Silverado 1500 For Sale
135 Great Deals out of 5,699 listings starting at $18,995
2015 Chevrolet Silverado 1500 For Sale
215 Great Deals out of 8,384 listings starting at $12,950
2014 Chevrolet Silverado 1500 For Sale
254 Great Deals out of 10,235 listings starting at $9,798
2013 Chevrolet Silverado 1500 For Sale
163 Great Deals out of 4,952 listings starting at $8,950

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.