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Blazer Jimmy 4WD Questions

84 messages,  Last post on Feb 21, 2009 at 10:17 AM

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#56 of 84 97 Jimmy 4wd problem-need advice please by arvada Dec 30, 2007 (11:59 am)
This is my daughters 97 Jimmy v6 auto. The 2wd button does not light, the 4wd buttons do. I hear the clicking under the dash. 4wd will not engage, but when I try to go to 2wd I hear the right front grinding. It recently had the heater core replaced. I removed the battery connection for 30 minutes, turned on/off 5 times. No changes. the plug on the back of the dash switch seems tight but I reseated it anyway.   Any help nailing this down is appreciated since I have the flu and don't have much energy to trouble shoot every single point if I don't have to. Replies to this message: arvada (Dec 30, 2007 2:32 pm)
#57 of 84 Re: 97 Jimmy 4wd problem-need advice please [arvada] by arvada Dec 30, 2007 (2:32 pm)
Replying to: arvada (Dec 30, 2007 11:59 am) Small update. I have since pulled the TCCM plug and cleaned with WD40, pulled the battery/tray and the vacuum module under the tray doesn't have any broken lines to it. I'm not sure what to do with the battery in order to test it while the engine is running. I followed the vacuum lines to the area of the distributor/trans dipstick tube. I could see where it went down to. I did find one vacuum line by the power brake unit plugged with a screw. I attached it to the round black vacuum bottle on the hood. No changes. I may take it to a shop tomorrow since I didn't want to get under it today (cold, wet). Any additional ideas welcome. Thanks.
#58 of 84 2002 4WD LS - Stuck in 4hi by chewy77 Jan 03, 2008 (5:46 pm)
Shifted into 4hi yesterday morning. Felt the 4WD engage. Immediately after, all of yellow 4wd indicator lights on the 4wd push buttons shut off. After driving for about 2 minutes the light on the 4hi button came back on. Now it is stuck in 4hi. I have pushed the 2hi button multiple times and nothing happens. Any idea what the problem could be? Any help would be greatly appreciated. Thanks.
#59 of 84 YOU CAN FIX YOUR 4WD by maurerush2112 Jan 05, 2008 (5:58 am)
i recently received a 95 blazer for my daughter. it needed a little here and there, but in decent shape for age and miles(265,115) and obviously the 4wd didn't work. I have been trying to be a good mechanic all my life 30+ yrs. feel i know quite a bit, but as any good mechanic would say, not everything. i am always open to listening, and reading,etc. I knew coming to this forum area I would be helped by reading complaints that are consistent to mine. i must give an open thank you to everyone who participates in these forums. a mechanic knows that you can't keep up on every model or every problem, and i've worked on my share of blazers/s- trucks, but not everyday. so reading the posts here refreshed my memory on the what, where, hows, etc. for those who are searching for the cure of no 4wd, my solution was completely checking all electrical connections, all vacuum hoses including the 3 port switch on the transfer case underneath. take the time to check it. the three hoses eventually route up over the top of the transmission and are assumed to be protected from the elements, but one of them i found was bad. also one at the actuator was cracked. also all from purge canister (black ball drivers side). also do not overlook the main line from purge goes to a main port on backside of intake just left of distributor. that one is hard to see, but if its disconnected you will not have 4wd. all my babbling comes to this... i got this truck from a relative. was told the 4wd never worked, and they had it for approx. 9 yrs. i took a couple hours of my time, traced every possible vac line, elec. connector, got dirty,  but my daughter has a 4wd that actually has 4wd. my complaints were consistent with everyone elses but by taking the time to read everything i could find here, it helped me cut hours and possibly dollars off the whole project. as an old timer once told me, "If you don't learn something new everyday, your not paying attention in life" Replies to this message: aubreyd (Jan 05, 2008 4:00 pm)
#60 of 84 Re: YOU CAN FIX YOUR 4WD [maurerush2112] by aubreyd Jan 05, 2008 (4:00 pm)
Replying to: maurerush2112 (Jan 05, 2008 5:58 am) Just to had a question to your checks.When I checked the purge canister under the hood I found that it was about half full of hyd oil. Any idea where it accumulate from and what would be the fix?Nobody I've talked to so far has any idea including the local GM dealer.
#61 of 84 re:aubreyd by maurerush2112 Jan 07, 2008 (4:26 am)
was it trans oil or motor oil? if it was motor oil, I could see possible reasons for that. is your transmission at proper level of fluid when it is hot? if it was over filled you might have certain problems with that. is it a good runner, or does she have a few miles on her? does it smoke or use oil? if the trans is seriously over filled, or you are experiencing "blow by" in the engine, you could point finger in that general direction. I've seen oil in vacuum lines before, but usually the trans level, or oil level was too high , or blow by existed because of either worn engine, or non-maintenance of emission systems Replies to this message: aubreyd (Jan 07, 2008 6:50 pm)
#62 of 84 re:aubreyd [maurerush2112] by aubreyd Jan 07, 2008 (6:50 pm)
Replying to: maurerush2112 (Jan 07, 2008 4:26 am) It was deffinitly tranny oil. Oil levels are all good It has 250,000 kms but other than a few electrical problems it is a good runner. I try to keep everything well maintained but sometimes we get busy and maint schedules slide.
#63 of 84 Re: 2001 Chevrolet Blazer 4WD [wally1937] by zenebisis Jan 16, 2008 (2:34 pm)
Replying to: wally1937 (Apr 10, 2007 8:28 am) yes, no fuse means no cruise... check the wires for the ABS on the new bearings, this is what causes that ABS problem... I had it twice, once before replacing the bearings and the 2nd time I had a broken wire leading to the ABS box... you may need to pass a dealer to have the computer reset on the ABS once this is fixed... good luck.. BTW if the bearing are not GM AC delco this can also be your problem, the first set of bearing I got, just didn't work with the ABS system and had to be replaced a 2nd time.
#64 of 84 4wd question by zenebisis Jan 16, 2008 (2:40 pm)
I have a 97 blazer LT with the 4wd, only i don't have the buttons to swap from 2 to 4 wheel... I wanted to know if this option can be added and what changes would have to be made to do so? anybody done this already?

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