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    Question about ZW7 Smooth Ride (Nivomat) shocks

    I'm not really sure. By my logic, if an 04-06 4WD ZW7 vehicle originally came with Nivomats and AC Delco offers a cheaper replacement (the blue ones) wouldn't there still be a Nivomat option offered by AC Delco? Furthermore, if they offered a cheaper replacement for the 4WDs, wouldn't they also...
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    Question about ZW7 Smooth Ride (Nivomat) shocks

    The plot thickens... maybe it's model year dependent? For 2003 the small blue shocks 540-433 are not listed but it lists 2 different nivomats For 2005 there are 2, the first is a non-nivomat and says 4WD and costs only ~$50. The 2nd is a Nivomat but it says it's for RWD I'm confused for...
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    Question about ZW7 Smooth Ride (Nivomat) shocks

    Unfortunately, after wasting some of BADRIDES' time getting pictures and negotiating on the shocks and springs, there appears to be some truth to this. I was under the impression that ZW7 Premium smoothride suspension meant Nivomat shocks. I don't believe it does. At Rockauto there are 2...
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    Just got a suburban and i need your help. brake calipers Dilema

    On Rockauto one is listed "w/ spreading fingers pad clips" and one "w/o spreading fingers pad clips"... I called Raybestos and spoke to a Tech Rep. Told him I had an '08 and their catalog was showing 2 different calipers. It was hard to understand what he was saying, I have a cold with a little...
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    Just got a suburban and i need your help. brake calipers Dilema

    I know there was a brake change early in the NNBS... I've see reference to use year 2008 when looking for front brake parts to avoid the very early NNBS parts. But I'm confused by the Raybestos application guide. It seems to indicate the change was made mid-way through the 2008 MY. 2007 front...
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    Rear Axle/Differential Rebuild AAR

    ETA, sorry for the length but I really wouldn't be putting this info here if I didn't feel it was important. Differential repair is a complicated process that some liken to "an art" This information is the result of many, many, many hours reading online forums etc plus a generous dose of...
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    Need new calipers, I don't know much about the various brands?

    Just need rear calipers for now but will likely replace fronts at some point. I'm not sure I trust the local brick & mortar stores to carry good quality parts anymore. Plus, I can get name-brand cheaper online than they charge for their "store brand"... Perusing rockauto shows me there are...
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    Looking at buying NBS Hoe/Kon; questions

    It's normal for a manufacturer to source "the same part" from multiple suppliers. Many suppliers simply can't produce enough so they have multiple. As they received a batch in from X maker they used them, then moved on to a batch from Y makers, then Z maker. The vehicles likely rolled off the...
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    Ecm electrical issues? Looking for help

    JMHO, disconnect the aftermarket security system... With aftermarket security systems it seems like it's not a question of if its going to wreak havoc on the other systems, it's just a matter of when... Many parasitic battery drains problems are caused by aftermarket security systems as well as...
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    Catch Can disappointment pics inside

    The point I'm making is, with a catch-can you're paying a lot of money to still feed that crap to your intake. Has there ever been truly scientific testing done to see what is making it past the catch-can? You can't just put another catch-can there to see what made it past the first because you...
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    Catch Can disappointment pics inside

    Its not so much me doubting the need to get the vapors out of the intake, I trust that. It's just deciding what to do with them... many run a catch can bc thats the environmentally friendly way buts that's at a cost and I suspect the catch cans are still letting a lot of vapors by... vents...
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    Transmission rebuild kits

    IMHO, you're nucking futs if you want to have a perfectly good transmission torn down just for the heck of it...transmissions are finicky beasts and the risk of causing problems by tearing it down is too high... if you really want to have one built up right for just the cost of parts seek out a...
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    Catch Can disappointment pics inside

    Bumping this to find out if you ever installed your breathers... I'm kicking around the thought of a catch can... they seem a bit pricey for what they are...
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    Transmission rebuild kits

    Towing? I'm not sure the history that caused it but mine had a new tranny put in at the dealership at 81k miles (prior to my ownership)
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    Question about ZW7 Smooth Ride (Nivomat) shocks

    My 2005 XL has ZW7 listed on the RPO codes. The shock absorbers are a smaller'ish diameter (maybe 2.25") and blue color. However, every time I've been to a scrap yard and found a vehicle with ZW7 suspension the shock absorbers are black and larger diameter. Previous to a few weeks ago all the...
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    Wierd shifting

    The reason for 2 sensors is the Drive by wire... the butterfly in the throttle-body isn't physically connected to the pedal at all, it's driven electrically. Push the pedal, there is a sensor that tells it the throttle position you're calling for. The PCM then sends signals to an actuator that...
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    Looking at buying NBS Hoe/Kon; questions

    The RPO code for the 4L80-E is either MT1 or MN8 (both are listed in my RPO master list but I'm not sure which one of those would have been included in the GMT800 style SUVs. The MN8 is listed as Heavy-Duty if that makes a difference. M30 is the 4L60-E MD6 is the 4L65-E which I think would only...
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    Looking at buying NBS Hoe/Kon; questions

    In addition to this, you can generally also figure out the engine by the drivetrain. IE, AFAIK, the AWD models were always coupled with the 6.0L engine and the only way to get the 6.0L was to get the AWD. Vice-verse for the 5.3L and the 4WD & 2WD models. Only way to get a 5.3L was with the...
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    Transmission rebuild kits

    The odds of finding all the good upgrades in a single kit are very slim... but I haven't specifically looked for one for this transmission so I'm not sure. That being said, my take on torque converters, by the best you can afford. A failed torque converter (or any hard-part for that matter) is...
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    Fuel filter change 5.3 2004 Flex fuel.

    L59, which is the flex-fuel engine...
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    Fuel filter change 5.3 2004 Flex fuel.

    Bumping this with a question... I thought all Z-vin engines (flex-fuel) had the fuel filter for the 00-06 model years. I was under mine the other day curiously looking around but couldn't find the filter. I know I'm looking in the right place because the ABS module was right there just like in...
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    Front differential rebuild GM 8.25 IFS (needs to be a sticky)

    The Truetrac is a maintenance free limited slip. But unlike a normal clutch type limited slip that transfers less torque the more it slips (due to heat build-up in the clutches etc), the Truetrac's unique, patented mechanism bites harder (locking the 2 wheels together) with more torque and slip...
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    Front differential rebuild GM 8.25 IFS (needs to be a sticky)

    I knew you were talking about the front but I had a brain fart when thinking about the shims; they're installed totally different so the super shims don't really get you anything on the front. That being said, Ibet the Yukon/Motiv shim kits are just as good as the dealer offerings. Lastly, I...
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    Front differential rebuild GM 8.25 IFS (needs to be a sticky)

    I would suspect that you can get aftermarket shim kits for the front, just as the rear. If so, IMHO, you want Super shims, either from Yukon Gear or Motiv. Both make a shim kit (conveniently both called super shims) that consists of a thick inner shell and a thick outer shell. You sandwich the...
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    When to know if axle-shafts need replaced?

    Vehicle: 2005 Yukon XL 4WD, 120k miles. BLUF: How do I know when it's time for new axle shafts? Details: A few weeks ago my differential carrier bearings went out. I pulled it all apart to replace the carrier bearings (and pinion bearings because metal found it's way up and started...

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