Last post on Jun 24, 2012 at 9:26 PM
You are in the Chevy Express & GMC Savana
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Chevrolet Express, GMC Savana, Chevrolet Express Cargo, Chevrolet Sportvan, Chevrolet Chevy Van, Chevrolet Chevy Van Classic, Van
#605 of 654 GMC Savana vs. Chevy Express
Feb 24, 2009 (3:32 pm)
Are these two vans the same product off the line excpet for the name plate?
Great forum here!
Feb 27, 2009 (8:57 pm)
Zoyberg, I dont think your fp is your problem. 50 is actually normal. 58-63 is the book amount I think, but virtually all the ones I ve checked are 50-54 running.
I believ its the difference between key on and running with vacuum pulling the fp down alittle.
Since you did plugs and wires, thats probably the problem. Put cheap copper plugs in again, and check the wires carefully. The hesitation is undoubtably a mis causing your nisfire code. The bank 2 sensor 2 should be the passenger side rear (after cat) o2 sensor. My scanners can watch each o2 sensor seperatly to verify the operating condition.
The 420 code, has me stumped, other then a lazy o2 (rear drivers) or a bad cat itself. If you have plugged cats, that could cause your mis, the exhuast not being able to get out, thus causing a huge back up in the cylinder. Ussually they get progressively worse till the cat is completely closed and the veh will not run, or just barely. I would suspect the cats, maybe more if you towed with it, and or it has a lot of miles.
Ronwind: Yes the gmc and chevy express are the same vehicle with different name plates. Some say the gmc's are built better, and I always laughed at that, but just recently I compared an 04 express to my 03 savana. The savana does have some bolts holdng small trim peices on were the express does not, and it uses a spring clip. So it does infact look like the gmc maybe built a tinny bit better.
The grills and trims are different but all the major parts interchange, and many of teh van parts interchange with the chevy/gnc trucks also, like the 1500's and 2500's.
Most of the van parts are left overs from previous year truck builds. The vans get the left over stuff.
The 04 express awd, I just referenced is almost done......I put on larger combustion chamber heads, a mls head gasket, head studs, a z06 vette cam, a cummins intercooler, and ballbearing pt 72 turbo. It should make in the middle 500awh area soon.
#607 of 654 Re: 2008/2009 Chevy Express [gmjohn]
Apr 07, 2009 (2:34 pm)
2005 AWD Express Explorer Conversion with Tow package, 5.3L AWD.
I tow a 30ft I/O Pontoon most weekends May thru September, 25 to 30 miles each way. You really know it is there mostly at 50MPH+. From a stop you hardly notice. When I first tested a similar tow vehicle it had a 5.7L and was much better at the 50MPH+ speeds. Start/Stops were equal.
Hope that helps.
#608 of 654 expess 3500 turn/brakes light problems
Apr 14, 2009 (9:18 pm)
right turn signal works good thenwhen i put brake on turn signal speeds up, ??? how do I fix
#609 of 654 Re: expess 3500 turn/brakes light problems [cjolibois]
Apr 17, 2009 (1:12 pm)
you got me on the turn signal....it would look at the bulb, the wiring and teh grounds near the tail lights first.
The reason they fall on there face at 50 + mph is power and gear ratio. The 4l60e takes a huge jump from 2nd to 3rd. 3rd is 1 to 1, and if you dont have the tow package you have 3.42 gears. Tow package vans got the 3.73's. A huge improvement is to reprogram the pcm for different/later shifting. Hold second longer and have it shift to 3rd at a higher rpm/speed. This could be done only when towing via programming but would be harder then just having it do it all the time.
When I bought mine, I reprogrammed it the next day.......and I still tweak it alittle when time permits. Alot of my job is programming trucks for tire/gear changes, and doing dyno/road tuning on gm cars (vettes, ta's and camaros) which are all virtually the same as the van.
#610 of 654 Express 3500 4x4 Diesel?
Apr 20, 2009 (6:45 pm)
Did they make a 3500 Express 4x4 Diesel?
If so, what years were then available?
#612 of 654 Problems with speedometer
May 10, 2009 (10:34 pm)
Good day, I live in Germany and drive a Chevrolet Express Year: 97.Ich have the following problem:
If I'm driven for some time, then my speedometer needle is hanging and is very snatch. Where should I search for the error?
#613 of 654 recharging air conditioning
May 11, 2009 (8:02 am)
Can anyone help me out with the recharging of my airconditioning? I've jumped on compressor clutch while adding freon.It just does'nt seem to be getting anycolder. The big line coming out of condenser is forming ice on it. Any ideas?
#614 of 654 99 GMC Savanna whirring/whining sound when in gear.
Jun 14, 2009 (6:15 am)
I have a 99 Savanna1500 5.7 ltr engine with 138k miles on it. Never had a problem with the transmission, but recently I noticed a whirring/whining sound when putting the van in reverse or drive. It doesn't make the sound when in neutral or park. No leaks and the transmission performs fine. I took it to my mechanic and he couldn't tell where the sound was coming from. He checked the transmission and drove it and said it wasn't the transmission. He thought it might be the belt tensioner or idler pulley, but the noise seems to be coming from under the van and not near the belt tensioner. The noise can only be heard at low speeds with the windows open as normal driving sounds drown it out.
Any help on what this is will be appreciated. Getting ready to take a 2000 k trip this summer and don't want to break down on the road.