2002 Gmc 1500hd 4 Wd.. Queastion?

FIRSTTRUCK · 10-26-2007, 12:58 PM

Hi All...
I Recently Bought A Very Clean Well Kept, 2002 Gmc 1500hd, Pickup. Of Course The Owners Manual Was Not Included, So, My Question Is: do I Have To Stop This Truck To Engage/ Disengage The 4 Wd, Or Is It A " Shift On The Fly" ????????

LOOKS LIKE NOBODY KNOWS THE ANSWER TO THIS ONE...

FIRSTTRUCK · 11-05-2007, 09:23 AM

Quote:

Originally Posted by FIRSTTRUCK

Hi All...
I Recently Bought A Very Clean Well Kept, 2002 Gmc 1500hd, Pickup. Of Course The Owners Manual Was Not Included, So, My Question Is: do I Have To Stop This Truck To Engage/ Disengage The 4 Wd, Or Is It A " Shift On The Fly" ????????

LOOKS LIKE NOBODY KNOWS THE ANSWER TO THIS ONE...

BOY... YOU`D THINK THAT AFTER AS MANY FOLKS READ THIS POST, IT WOULD HAVE GOTTEN AN ANSWER... I REALLY NEED TO KNOW. OR, I`LL HAVE TO CALL THE DEALER. MAYBE NOT A BAD IDEA.

75K30 · 11-05-2007, 09:35 AM

All 4 wd's will "Shift on the fly from 2wd to 4wd high.
You do not have locking hubs, so having to get aout of the truck is not necessary.
You will have to stop completely to engage and disengange low range.

duckkiller0010 · 11-05-2007, 07:38 PM

i have a 2000 chevy silverado 1500 with the push button 4 wheel drive it is shift on the fly but it has to be under like 45 mph or somethin like that

FIRSTTRUCK · 11-07-2007, 08:09 AM

Quote:

Originally Posted by 75K30

All 4 wd's will "Shift on the fly from 2wd to 4wd high.
You do not have locking hubs, so having to get aout of the truck is not necessary.
You will have to stop completely to engage and disengange low range.

THANKS 75K30.. I THOUGHT IT WAS BETTER TO ASK FIRST, THAN TEAR SOMETHIN UP THEN ASK.
I APPRECIATE THE INFORMATION. LIKE MY NAME SAYS, MY "FIRSTTRUCK".

15.50GMC · 10-29-2009, 09:48 AM

Just a sugestion, a very slow roll when shiftin into 4 HI, they recomend no faster than like 15 mph or sumthin, 4 lo however the trans has to be in N in order to get it to engage... personally I always come to a complete stop just incase in my truck, Ive broke a few IFS vacume locks engagin on the fly

15.50GMC · 10-29-2009, 09:51 AM

Oh btw dont know where you are located but when its really cold the light will blink for a little bit, GM in the infinate wisdom they have haha went away from the solid axle in '88, the IFS uses either a vacume lock or a heat lock to lock in the front diff. Depends on what year the truck is an they have gone back an forth on it a few times..... hope this helps man. Congrats on the new truck

mudseeker · 10-29-2009, 09:51 AM

old thread

10-26-2007, 12:58 PM	#1
FIRSTTRUCK Full Member Join Date: Oct 2007 Location: UPSTATE, N.Y. Posts: 31	2002 Gmc 1500hd 4 Wd.. Queastion? Hi All... I Recently Bought A Very Clean Well Kept, 2002 Gmc 1500hd, Pickup. Of Course The Owners Manual Was Not Included, So, My Question Is: do I Have To Stop This Truck To Engage/ Disengage The 4 Wd, Or Is It A " Shift On The Fly" ???????? LOOKS LIKE NOBODY KNOWS THE ANSWER TO THIS ONE... Last edited by FIRSTTRUCK; 10-27-2007 at 07:37 AM.

10-29-2009, 09:48 AM	#6
15.50GMC Junior Member Join Date: Oct 2009 Posts: 4	Just a sugestion, a very slow roll when shiftin into 4 HI, they recomend no faster than like 15 mph or sumthin, 4 lo however the trans has to be in N in order to get it to engage... personally I always come to a complete stop just incase in my truck, Ive broke a few IFS vacume locks engagin on the fly __________________ PUTTIN IT DOWN 31" AT A TIME

10-29-2009, 09:51 AM	#7
15.50GMC Junior Member Join Date: Oct 2009 Posts: 4	Oh btw dont know where you are located but when its really cold the light will blink for a little bit, GM in the infinate wisdom they have haha went away from the solid axle in '88, the IFS uses either a vacume lock or a heat lock to lock in the front diff. Depends on what year the truck is an they have gone back an forth on it a few times..... hope this helps man. Congrats on the new truck __________________ PUTTIN IT DOWN 31" AT A TIME

10-29-2009, 09:51 AM	#8
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	old thread __________________ i'd rather be hunting

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11-05-2007, 09:35 AM	#3
75K30 Senior Member Join Date: Jul 2006 Posts: 2,992	All 4 wd's will "Shift on the fly from 2wd to 4wd high. You do not have locking hubs, so having to get aout of the truck is not necessary. You will have to stop completely to engage and disengange low range.

11-05-2007, 07:38 PM	#4
duckkiller0010 Senior Member Join Date: Jun 2007 Posts: 120	i have a 2000 chevy silverado 1500 with the push button 4 wheel drive it is shift on the fly but it has to be under like 45 mph or somethin like that

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