GMT400 History

[1badgmc]

They did change something for '98, but it's in the computer. I have a programmer that will work on the '98+ Vortec 305 & 350, but it won't work on the '96-'97.

 

[GWKP]

really...do u have any idea what they did to em? does it produce more output or is that just a myth?

 

[1badgmc]

There's no power difference. I don't know that there are any physical differences in the mechanical components, but I do know for a fact that there are some computer differences.

 

[DRAGGIN95]

Also, I haven't seen it mentioned but there was also a 130 mph speedo, in the police tahoe's, I have one for my crew cab.

 

[fireball 440]

Factory tinted glass, my 1994 has it.

 

[Aloicious]

They did change something for '98, but it's in the computer. I have a programmer that will work on the '98+ Vortec 305 & 350, but it won't work on the '96-'97.

the PCM was pretty much the same, but there were at least some wiring changes to the PCM between 96, 97, and 98+...the 96 and 97 used a 5 plug PCM, the 98+ was 4 plug. and even between years there are different wiring pinouts on the PCM's.

the 98+ had a fuel tank vapor pressure sensor, where the 96 and (I think) 97 did not. the fuel pump and sender itself changed in (I think) 98 from the metal 'pump on a stick' style, to a plastic housing style.

 

[1badgmc]

Factory tinted glass, my 1994 has it.

Yeah? Ok.

 

[frito-bandito]

1995:


1997:
While the 2-door Tahoe would continue, the 2-door Yukon was discontinued.

Extended Cabs now came standard with the 3rd door on the passenger side.

I got a 98 ex cab that don't have the third door.

 

[Greg]

1995:


1997:
While the 2-door Tahoe would continue, the 2-door Yukon was discontinued.

Extended Cabs now came standard with the 3rd door on the passenger side.

I got a 98 ex cab that don't have the third door.

I'll fix it, and nice catch. I forgot about that, and I did find a '00 GMC ECLB with no 3rd door too.

 

[frito-bandito]

Yeah, I was disappointed when I found out that it didn't have the third door when I test drove it.

1badgmc, we are vacationing in the Dallas area soon, how bout hooking my 98 up with some power programming, lol j/k!