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Chevy Blazer GMC Jimmy Maintenance and Repair

3449 messages,  Last post on Nov 07, 2009 at 8:55 AM

You are in the Chevrolet Blazer Forum. Your Hosts are steve_ & tidester

What is this discussion about? Chevrolet Blazer, GMC Jimmy, SUV


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#3061 of 3449
bleeding new brake job by bigd1948
Nov 06, 2007 (5:28 pm)
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i replaced the brakes and bleed the brakes. the brake pedal is hard and seems fine, when i start the car the brake pedal goes soft
#3062 of 3449
Gear ratio by twistkick
Nov 08, 2007 (1:43 pm)
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I have a '97 GMC Jimmy that needs a new rear end. I was told I need to find out the gear ratio to make sure I get the right parts. How do I find the information I need?
#3063 of 3449
Re: bleeding new brake job [bigd1948] by Mr_Shiftright HOST
Nov 08, 2007 (4:49 pm)
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Replying to: bigd1948 (Nov 06, 2007 5:28 pm)

You mean just "soft but working fine" or "soft and to the floor?"
 
If you just feel the pedal depress a little when you start up, that's okay, that's just the power brake booster kicking in. If the brakes work fine and feel fine after that, you're okay.
#3064 of 3449
Re: Gear ratio [twistkick] by jlflemmons
Nov 09, 2007 (6:33 am)
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Replying to: twistkick (Nov 08, 2007 1:43 pm)

Inside the glove box is a white label listing all the options and configuration of the vehicle when built. Look for an option like "GU6". Here are most that I know of:
 
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSITRACTION)
 
Most common in the small Blazer/Jimmy 2wd is the GU6/3.42.
#3065 of 3449
DTC P1886 by johnnycage
Nov 14, 2007 (5:49 pm)
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Hello, I have a 1996 Chevy Blazer4X4 I have had for about 4 years now with no problems. It has about 157,000 miles on it. And I never use the 4x4 option. Recently the Service Engine Soon light came on. I took it in for a free diagnostic check at a local shop. He told me the service code he got was a P1886, and has a issue with the 2-3 shift solenoid on my automatic trans. I did know the transmission had started to react very slow on the start when this light came on. And it never engages in overdrive now. Whats really odd is when I start it in the morning, or even shut if off for a few minutes. The trans shifts great. Then it slowly starts to get in the mode of high RPM to get the truck moving from a traffic light. If I manually shift from 1-2 there is no change and the engine RPM's hi. But when I go from 2-3, it is hard on the trans in shifting. The shop said the trans looks very good. But suggests a shift solenoid to be replaced. And he said he can clean out the solenoid for under a $100 dollars to see if it helps. He claims it is next to the valve body under the pan. Is this something I can do? I'm pretty handy with taking apart the car in most repairs. I believe the trans I have is a 4L60 but I am not sure. Let me know if the shop said was OK, and if possible for me to do it myself, to save the extra bucks in these hard times. Thanks Much!!
#3066 of 3449
dont have a clue by cpuhach
Nov 22, 2007 (2:07 pm)
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i got a 95 blazer 4.3, problem is can run great then when u try to start it , it wont fire. has fuel, and spark, no ttouble codes , had to dissconnect battery or wait, then it starts right up. had it checked by Gm, cant find a problem, replaced computer still the same, any ideas? :
#3067 of 3449
Fuse & Electrical Prblems - NEED HELP!! by leoandme
Nov 26, 2007 (3:33 am)
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I've got a '96 Blazer 4x4, 4.3L, V-6, LS. Bought it used in '98, had 35K miles on it, and it's been pretty good to me, but it's now got a little over 100K on it, and the problems have started.
 
Here's my problem: Every time I start the engine, the #4 fuse (gauges) blows out, the daytime running lights go out, the dash lights go out, and it drains the battery right down in no time.
 
Put a new alternator in today, new spark plugs, plug wires, distributor cap and rotor, oil filter and oil changed. Apparently, none of those things helped at all, and it looks like it's an electrical problem, but I have absolutely NO idea of where to look for a short or wire damage first. Electrical is not our strong suit, but pretty handy with most other things and a quick learner.
 
Has anyone else had a similar problem or heard of anything like this? I would appreciate any help, because we're both stumped here and are running low on spare fuses. Please, please help!
#3068 of 3449
Fuse & Electrical Prblems - SOLUTION!! by leoandme
Nov 30, 2007 (9:58 pm)
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Thanks for all the help, guys, but we managed to find the problem on our own. Oddly enough (or maybe not), it was the ignition switch. I didn't think of that before because I didn't have any problems with the Blazer's starting, and it wasn't stalling, either. Nonetheless, all the weird and funky electrical/fuse-blowing problems were coming from a bad ignition switch. Just thought I'd post the solution in case anyone has/or will have a similar problem.
#3069 of 3449
P1870 Error code by lildavidjax
Dec 03, 2007 (5:22 am)
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'98 Chevy Blazer has error code P1870.I know this has to do with the transmission,but
don't know where to start.This has something to do with the surging I'm sure. Any ideas? Thank you guys!
#3070 of 3449
Re: A 4WD Dilemma [pfeifer] by foxracer1
Dec 05, 2007 (3:06 pm)
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Replying to: pfeifer (Jan 06, 2006 5:29 pm)

hi this is brian i also have a gmc jimmy i have the same problem. check all ur hoses u have a vacuum actuator under the battery tray follow the vacuum hose up to the fire wall and make sure its still hook after that look at the passager side kick panel take it off and u should see a box with wires going in to it check the wires and take them off an blow them off sometimes water gets in there and will make the wires damp or wet. its called the TCCM cumputer i had to replace mine and then my lights came back on in side so hope i help u good luck

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