I would have to disagree with you on the 13 gallon tank. I know that it is an 18 gallon tank. I know the fuel gauge says that it is empty, but there is really still about 3 to 4 gallons in it. I drove about 30 miles while my gauge was right on the line and when I filled up I put in about 16-17 gallons of gas in. After this I researched on Internet and found that it is an 18 gallon tank. I am also please with my Envoy. Mine is the 1998 which is the first year it came out. I have installed a custom Magnaflow® exhaust, Denso® iridium spark plugs, Hypertech® programmer, and an air intake and I have also noticed more power and better gas mileage. It is a great vehicle.
We've never had even a hint of trouble with our 2003 Envoy in 42,000 miles. It feels like it did the day we bought it and we'd not hesitate to buy another one.
You're right about the gas tank, I did a little reasearch myself and found out that it was an 18 gallon tank. The fuel sending unit is bad on my Envoy, which is sending faulty readings to the gas gauge - this explains why it appears to eat gas so badly. It's an expensive fix, so I'm leaving it alone for now.
I'll have to look into getting the hypertech unit... but a Gibson exhaust system is looking like a good buy for this vehicle.
It's a faulty fuel sending unit.
I have had a 99 and 2000 Savana, both with this same issue. I've researched the internet to find 1000's of complaints, but very few to GM. People need to call GM and complain! Then maybe they'd figure out there's a problem. Without data from customers, GM won't do squat for those of us that do call them. They assume there's no problem because few people call and complain. Even if you do it yourself or go to an independent mechanic, call GM customer service 800 462-8782 and tell them your issue.
Follow up on my 99 Envoy...k&n intake kit (100.00 on ebay) Gibson exhaust (130.00 on ebay). U can feel the power at take off and high end. Mid range need improvement, how will I do that? I will figure it out. A lot more thoatier sound tho not like a V8 but better than stock. Gas mileages improve even tho my foot heavy. Have not taken a long trip yet. Old city driving, 16 mpg, now 18 mpg. Old hwy driving 20.5 mpg, new???, planning a trip soon, 800 miles round trip.
We purchased our 1999 Envoy new. We have driven the car 60,000 very easy city miles over the years. This car has cost us thousands of dollars in repair cost after the warranty expired.
We have replaced the following items:
Battery (general repair)
Tires (general repair)
Upper and lower ball joints (both sides)
Tie-Rods (both sides)
Door bushings (cheap plastic)
6 sets of new breaks (way too excessive)
3 new rotors.
Water pump (GMC recently lost a class action law suit because of the type of antifreeze they used that caused the water system fail)
Complete rebuild of the 4-wheel drive system is now due (rebuild cost to be over $2,600)
The 1999 GMC Envoy has been nothing but a LEMON for us anyway. Different GMC Dealers have told us that the 1999 Envoy is the worst GMC SUV ever produced.
Just wanted to say that for the most part I enjoy my 1999 Envoy. However I have replaced the oil coolant lines four times already. As it gets older, it seems more electrical problems happen. Steering wheel LCD lights out on one side, now the tow button stopped working. Would like to know how to fix these things; if anyone has info, that would be great.
OK, me & my husband just brought our first American car in April 2010; a used 2005 GMC Envoy 60,000. Not even a year has gone past. We have had to change our BCM $400. Now I have this whining noise, and they say that our alternator is going bad. OMG, I will never buy another American car; we have had a Honda & Nissan, and never had any of these problems. My 1998 Honda is still going strong at 220,000 miles!
"OK, me & my husband just brought our first American car in April 2010; a used 2005 GMC Envoy 60,000"
Oh PLEASE. People who buy abused used cars that have been totally trashed and then have trouble have little sympathy from me, especially when they scream "ALL AMERICAN CARS ARE BAD" based on ONE abused junker. We bought our GMC Envoy brand new. It is close to 100,000 miles and has not had even a brake job yet. All it has had in 8 years is one battery and one set of tires. My co-worker's wife just went on a cross-country trip in their GMC with their children. It had 167,000 miles on it when they left. He trusts it far more to get his family safely home than he does their Japanese import with 100,000 miles (which is currently in the shop having $2800 worth of repairs done).