hesitation

[feb]

I have a 2003 trailblazer 6 cyl. This suv is great and on the highway, I can get up to 23 mpg driving 70 mph. What's been bugging me is when I first start up the car, put it in drive and take off, there is a hesitation. After that, on stop & starts, there is no more hesitation until I turn it off, restart it and take off again. The computer was reprogramed but it did not help. Any suggestions?

Feb

[ScarabEpic22]

Welcome feb!

GM builds their trannys to engage the gears after approx. .5-1 second after you shift. It puzz,led me for the longest time too, but I have learned to just accept it and wait a split second before I go. Im not sure there is a fix, it is built into the transmission software, but I might be wrong.

Also, on my 02 it has seemed to be more pronounced lately, the past few months it has seemed to take just s tiny bit longer to engage than before, but I dont really pay that much attention anymore to it.

[feb]

It's not in the transmission. I can wait for 10 seconds, give it gas and it still hesitates. It is in the initial take off. After that, I can stop, back up, put it in drive and take off with out hesitation and no waiting on the transmission.

feb

[EnvoyON22s]

just thought i'd let u know....

mine has the same issue....hesitation at take off.

i took it to the dealer and they said that its normal, and its due to the Electronic Throttle that our cars have.

[Neil Patel]

I've always had the same problem on my '03. Every once in a while when I hit the gas the RMPs will drop, the truck will hesitate and then start to move. I've described it as the same feeling you get when you almost stall a manual transmission car in 1st gear. Of course the dealer was unable to replicate it, but since it hasn't caused any issues over the course of 50K miles, I too have just learned to not care about it.

[ylab]

Funny, my '02 when new was horrible the first time I'd try to accelerate in the morning or after sitting for an extended period of time. Push the gas, feel the vehicle sort of slow and then finally surge forward. They reflashed the PCM with updated code in late 2003 and the problem went away.

Odd part is that it now does it in Park/Neutral when fully warmed up. If you touch the gas the engine sort of stubles and then revs up......guess the fix trades one for the other. - Oh well, I'm thinking that Wester's tune will straiten it all out!

[chivistb]

Odd part is that it now does it in Park/Neutral when fully warmed up. If you touch the gas the engine sort of stubles and then revs up......

Mine does the same thing ('02) when I let it runnig for a good 20 mins. so I thought it was because it's fully warm up and didn't pay too much of a attention to that.

[BHawk]

cold engines do tend tohesitate more than a warm one

[feb]

Originally Posted by BHawk

cold engines do tend tohesitate more than a warm one

I agree but I can turn off the engine for five minutes get back in and take off and there is still that initial hesitation on the first takeoff. Ain't that a trip?

[Myles137]

My '02 Ltz does it as well, but only if I immediatly try to take off after shifting.