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2003 Cadillac Escalade AWD
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19 Posts
Discussion Starter · #1 ·
My wife and I took a quick trip from Houston to Dallas this weekend and half way to Dallas (100 miles) my 2002 Escalade fuel guage went to empty... I just filled up and even put Gumout fuel injector cleaner in before fillup.

During our commute, every now and then it would show full tank, but for about 75% of the drive it read empty. What's happening? Is this common? What do I do to fix?

The truck drove fine, it just showed I had no gas - what gives?

Thanks for the help guys....
 

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03 cadillac escalade
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11,910 Posts
i think there is a sensor in the tank that might be bad only way of replacing it is by droping the tank and checking the wiring for the fuel sender system that goes to the sensor
 

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2003 Cadillac Escalade AWD
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19 Posts
Discussion Starter · #3 ·
Just wanted to update incase anyone has ever had this problem (tahoe, escalade etc...). It needed a new fuel sending unit, so I took it to my local mechanic and had him drop the tank. He works for $80/hour and I purchased the ACDelco fuel pump assembly. I was told not to go aftermarket (Autozone etc), so I bought this off of ebay brand new for around $265. AdvancedAuto was asking around $400+ just for the part.

Anyway, he replaced the entire fuel pump assembly (includes fuel sending unit) and it works like a charm. Total out the door bill was $265 parts and $300 labor. You can do this yourself but I'm not experienced enough to do the job so I didn't mind paying someone.
 

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escalade
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Question; what caused your fuel sending unit to go out? I began having that same problem along with a few other wiring type issues over a year ago. Just recently, the problem has gotten TERRIBLE! We've had the fuel filter changed, the fuel pump tested, etc but yet my Escalade continues to act as if it's running out of gas! We've tried it all, EXCEPT ANY WIRING TESTING/CORRECTING. I'll put in $30 of gasoline and end up "out-of-gas" in ten miles and the ONLY thing that gets it going again is more fuel!!! Could it possibly be the wiring and once I add more fuel, the wiring unit is thinking its ok again??? HELP!!! GAS IS COSTING ME $100/day LITERALLY AT LEAST AND I ONLY DRIVE 50 MILES TOPS A DAY
 

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Cadillac Escalade Platinum
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79 Posts
I remeber reading something several years ago about sulfur in gasoline being a contributing cause. I Googled "Sulfer in gasoline GM" and found this that I cut & pasted below. Not sure if this will help or not, but interesting for sure:

"GM has just issued a TSB
on this problem that applies to ALL GM vehicles and
blames the high incidence of sending unit failures
on high levels of sulfur in gasoline. The sulfur
corrodes the sliding resistor mechanism and
produces erratic and inaccurate gauge readings. To
address this problem, GM has released a FUEL
TANK ADDITIVE.
According to GM TSB #06-00-89-07BB, you should
purchase a bottle of GM Fuel System Treatment
Plus (part #88861011 for GM brand, 88861013 for
AC Delco brand, and 88861012 in Canada) and add
it to your tank at every oil change. The additive
cleans the sulfur corrosion from the sending unit
and prevents new corrosion by laying down a
protective film. The additive also removes engine
deposits."

Good luck!
Mitch
 

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2005 escalade
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90 Posts
Question; what caused your fuel sending unit to go out? I began having that same problem along with a few other wiring type issues over a year ago. Just recently, the problem has gotten TERRIBLE! We've had the fuel filter changed, the fuel pump tested, etc but yet my Escalade continues to act as if it's running out of gas! We've tried it all, EXCEPT ANY WIRING TESTING/CORRECTING. I'll put in $30 of gasoline and end up "out-of-gas" in ten miles and the ONLY thing that gets it going again is more fuel!!! Could it possibly be the wiring and once I add more fuel, the wiring unit is thinking its ok again??? HELP!!! GAS IS COSTING ME $100/day LITERALLY AT LEAST AND I ONLY DRIVE 50 MILES TOPS A DAY
sounds like a motor issue not a fuel issue. what are you getting for mileage? First thing I would look at is fuel presuure regulator(if you are really getting that bad of gas mileage.)
 
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