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Thread: GM Lean :(

  1. #1

    Default GM Lean :(

    Hey guys,
    i know im real late on this, but i didnt even find out about it until a few months ago...
    I have a 2000 silverado and have the GM lean :( i never noticed it until about 3 years ago when i put a 3" fabtech spindle lift on my truck) and we though the lift was defective and always have until i read and found out about our trucks having this lean...
    My current measurements are...

    LF: 37.75" RF:38.75"
    LR:39.25" RR:40"

    and i also have a leveling kit on my truck so it kind of frustrates me that even though i have the lean, my numbers still average an inch lower in the front.

    that being said... is this covered by the dealer since i have more than a .5" difference, or what is the best way to fix it? i do not want to lower anything! if i have to fix it myself i want to lift the low side, not lower the high side. seeing that i already had to trim some valance for clearing my tires on the left side, but not the right!(looks like crap) Any suggestions guys?
    2000 Chevrolet Silverado

    Powertrain:
    4.3L V6, 4L60E, 2WD, Single Cab
    Performance:
    Airaid CAI
    Poweraid TB Spacer
    Flowmaster 10-series exhaust (dumped)
    BLACKBEAR TUNED!!!
    Edge CS insight monitor
    4.10 gears
    Limited-slip differential
    LS-1 Dual Electric fans
    Corvette tranny servo swap

    Audio:
    Head Unit: Alpine
    Speakers: Alpine SPR-60C 6.5" component set, 4X6 Infinity Kappas
    Subs: 2-12" Kicker CVT's
    Amps: Alpine-M1000 (subs), Alpine MRX-F65 (Speakers)


    Tires/Wheels:
    305/70R16 NITTO Terra Grapplers
    16" PROCOMP 7089's
    Suspension:
    2" leveling kit
    3" Fabtech Spindle Lift Kit
    Front/Rear-Bilstein 5100 shocks

    Lighting:
    FRONT
    35W HID Low Beams
    RECON LED smoked roof cab lights
    REAR
    HELLA LED taillights and 3rd brakelight
    HELLA FF-75 Aux. Reverse Lamps
    RIGID dually D2, flush mount, wide beam
    Accessories:
    Hawk HPS Brake pads
    Russell braided steel brake lines
    Powerstop-red powdercoated brake calipers
    Powerslot Cryo brake rotors
    EGR in-channel window visors

  2. #2

    Default

    Idk man i havent really heard of this i guess i have a 98 gmc sierra and never noticed this problem and now have a 08 silverado z71 and no a thing wrong with lean my lift is a 7.5 inch lift too and it's level in front and rear but maybe a 1inch difference in fender height compared to front which is common. I would call the dealership and ask questions and see what you can get out of it.

    2008 Chevy Silverado Ext. Cab Lt Z71 5.3 V8
    7.5 Inch Rough Country Suspension Lift
    RBP Replica Grille Black w Chrome Rivets
    Recon Smoked Cab Roof Lights
    N-Fab Powdercoated Gloss black Cab Length Nerf Steps
    5% Tint over 20% all the way around / 5% Eyebrow Strip
    AVS Smoked Window Visors
    Z71 Stickers Black & Metallic Silver
    Tow Mirrors / Smoked Turn Signals
    XM Satellite Radio Fin / Color Matched
    Interior Plastic Pieces / Color Matched
    Power Acoustic Tweeters
    Painted Bowties / Color Matched
    Painted Door Handles / Color Matched
    Smittybilt Bull Bar / Color Matched
    Custom Rolled Edge Exhaust Tips / Color Matched
    Custom 2.5 Inch Cat Back True Dual Exhaust
    Flowmaster Super 40 Series Dual in / Dual out
    Magnaflow Tru-X Pipe
    K&N Air Filter
    18x9 Rockstars Machined Black
    Center Caps / Color Matched
    33.13.50 Nitto Terra Grapplers
    New Front Wheel Well Liners
    Eagle Eye Black L.E.D. Tailights
    Eagle Eye Black L.E.D. Third Brake Light / Smoked
    Eagle Eye Black L.E.D. Halo Projector Headlights
    Notto HID Kit 10,000k Low beams
    Recon L.E.D. Light Bar
    Buschwacker OE Style Tailgate Cap
    AMI Gloss Black Antenna
    Debadged Chrome Lettering
    Door Molding Removed

  3. #3

    Default

    Quote Originally Posted by reggiecab2000 View Post
    Hey guys,
    i know im real late on this, but i didnt even find out about it until a few months ago...
    I have a 2000 silverado and have the GM lean :( i never noticed it until about 3 years ago when i put a 3" fabtech spindle lift on my truck) and we though the lift was defective and always have until i read and found out about our trucks having this lean...
    My current measurements are...

    LF: 37.75" RF:38.75"
    LR:39.25" RR:40"

    and i also have a leveling kit on my truck so it kind of frustrates me that even though i have the lean, my numbers still average an inch lower in the front.

    that being said... is this covered by the dealer since i have more than a .5" difference, or what is the best way to fix it? i do not want to lower anything! if i have to fix it myself i want to lift the low side, not lower the high side. seeing that i already had to trim some valance for clearing my tires on the left side, but not the right!(looks like crap) Any suggestions guys?
    Below is a G.M. Service Bulletin Regarding the......Vehicle Chevy Lean.......at the bottom of this G.M. bulletin, it shows what parts and part number's for correcting this Chevy Lean....

    Subject Vehicle Lean.......Left Front Site Low or Right Rear Sits High (Add Spacer Between Left Rear Spring Pack and Axle) #06-03-06-005A - (01/12/2007)

    Models: 1999 to 2007 Chevrolet Silverado (Classic) 1500 ( Ton) series

    Models: 1999 to 2007 GMC Sierra (Classic) 1500 ( Ton) Series

    With Two-Wheel Drive
    This bulletin is being revised to update the models to reflect that bulletin only applies to 1500 ( Ton) Series. Please discard Corporate Bulletin Number 06-03-06-005 (Section 03 -- Suspension).

    .....Some Customers,
    Have commented that their vehicle appears to lean. In most cases, the vehicle will sit low left front or high right rear.
    .....Correction,
    Measure fender wheel-opening heights, front and rear, to quantify vehicle lean. Fender wheel-opening heights are related to, but distinct from, trim height (a.k.a. Z and D height). The front wheel-opening height is known as P height, and the rear wheel-opening height is know as R height. The P and R heights are not set at the factory, nor is a specification given for them. However, they are the most direct and repeatable measurement of what a customer would see as the vehicle leaning. Perform the following before measuring the fender wheel-opening heights:

    • Make sure the vehicle is on a level surface, such as an alignment rack.

    • Set the tire pressures to the pressure shown on the certification label. Refer to Label - Vehicle Certification in General Information.

    • Check the fuel level. Add additional weight if necessary to simulate a full tank.

    • To ensure proper weight distribution, make sure the rear storage compartment is empty.

    • Close the doors and hood.

    P Height and R Height Measurements
    P height and R height are measured the same way. They are the distance from the ground to the highest point on their respective wheel-opening, going through the center of their respective wheel. Record the measurement on the repair order.

    If the difference from left to right for P and R height is 15 mm (0.59 in) or less, no repairs are suggested as the vehicle is within specification. If the difference exceeds 15 mm (0.59 in) for either measurement, install the spring spacer to the left rear side of the vehicle following the procedure below.

    Raise and support the vehicle.
    Support the rear axle.
    Remove the U-bolt nuts, remove the U-bolts and anchor plate. Discard the U-bolts. DO NOT discard the nuts or anchor plate.
    Remove the lower shock nut and bolt.
    Raise the vehicle or lower the axle enough to allow for installation of the spacer. Install the spacer, P/N 15872657.
    Lower the vehicle or raise the axle.
    Install the lower shock nut and bolt.
    Tighten
    Tighten to 95 Nm (70 lb ft).

    Install the anchor plate, new longer U-bolts, P/N 15872655, and nuts.
    Tighten
    Tighten the nuts to 72 Nm (53 lb ft).

    Remove the axle support and lower the vehicle.
    Re-check the P and R heights in the previous location. Record these readings on the repair order.
    After all measurements are done, perform a road test and check headlight aim.
    If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

    Part Information,
    Part Number....15872655
    Description .....Rear Spring Spacer
    Qty.....1

    Part Number....15872657
    Description......Rear Spring U-Bolt
    Qty....2

    Part Number...15756770...is for a rubber insulator the dealers use to space the driver side coil spring.

    ....Side Note....If your left front is 1" lower , you can add one digit to your Part # that come on your truck and it will raise your left front approx 1"
    Last edited by 99'HEARTBEAT; 03-18-2012 at 08:15 PM.

    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  4. #4

    Default

    thanks for the reply and yeah i have seen that bulletin, but i definitely dont want to add any more height to the rear, if possible i want the front=rear (preferably). also i already have 3" blocks in the rear and i heard that doubling on blocks is not safe (or smart). and i have 2" rubber spacers on top of the front coils already (and honestly at $700 for the leveling kit, i think it looks cheap as sh**) would this spacer add more to that front left coil or is that unsafe as well?
    2000 Chevrolet Silverado

    Powertrain:
    4.3L V6, 4L60E, 2WD, Single Cab
    Performance:
    Airaid CAI
    Poweraid TB Spacer
    Flowmaster 10-series exhaust (dumped)
    BLACKBEAR TUNED!!!
    Edge CS insight monitor
    4.10 gears
    Limited-slip differential
    LS-1 Dual Electric fans
    Corvette tranny servo swap

    Audio:
    Head Unit: Alpine
    Speakers: Alpine SPR-60C 6.5" component set, 4X6 Infinity Kappas
    Subs: 2-12" Kicker CVT's
    Amps: Alpine-M1000 (subs), Alpine MRX-F65 (Speakers)


    Tires/Wheels:
    305/70R16 NITTO Terra Grapplers
    16" PROCOMP 7089's
    Suspension:
    2" leveling kit
    3" Fabtech Spindle Lift Kit
    Front/Rear-Bilstein 5100 shocks

    Lighting:
    FRONT
    35W HID Low Beams
    RECON LED smoked roof cab lights
    REAR
    HELLA LED taillights and 3rd brakelight
    HELLA FF-75 Aux. Reverse Lamps
    RIGID dually D2, flush mount, wide beam
    Accessories:
    Hawk HPS Brake pads
    Russell braided steel brake lines
    Powerstop-red powdercoated brake calipers
    Powerslot Cryo brake rotors
    EGR in-channel window visors

  5. #5

    Default

    Just to give you a heads up. I doubt any dealer will even try to help you since you've modified the suspension. They'll blame any lean on the aftermarket parts.

    97 Chevrolet Suburban K1500 5.7L
    78 GMC High Sierra K1500
    Fat, drunk, and stupid is no way to go thru life.

  6. #6

    Default

    I really don't think that many dealerships worry about leveling kits and not sure if it even affects the warranty? The main part is if the dealsership is nice they will still cover whatever on warranty because they know that didn't cause the problem but on the other hand the asss holeess will not give you a break and say they can't cover it!

    2008 Chevy Silverado Ext. Cab Lt Z71 5.3 V8
    7.5 Inch Rough Country Suspension Lift
    RBP Replica Grille Black w Chrome Rivets
    Recon Smoked Cab Roof Lights
    N-Fab Powdercoated Gloss black Cab Length Nerf Steps
    5% Tint over 20% all the way around / 5% Eyebrow Strip
    AVS Smoked Window Visors
    Z71 Stickers Black & Metallic Silver
    Tow Mirrors / Smoked Turn Signals
    XM Satellite Radio Fin / Color Matched
    Interior Plastic Pieces / Color Matched
    Power Acoustic Tweeters
    Painted Bowties / Color Matched
    Painted Door Handles / Color Matched
    Smittybilt Bull Bar / Color Matched
    Custom Rolled Edge Exhaust Tips / Color Matched
    Custom 2.5 Inch Cat Back True Dual Exhaust
    Flowmaster Super 40 Series Dual in / Dual out
    Magnaflow Tru-X Pipe
    K&N Air Filter
    18x9 Rockstars Machined Black
    Center Caps / Color Matched
    33.13.50 Nitto Terra Grapplers
    New Front Wheel Well Liners
    Eagle Eye Black L.E.D. Tailights
    Eagle Eye Black L.E.D. Third Brake Light / Smoked
    Eagle Eye Black L.E.D. Halo Projector Headlights
    Notto HID Kit 10,000k Low beams
    Recon L.E.D. Light Bar
    Buschwacker OE Style Tailgate Cap
    AMI Gloss Black Antenna
    Debadged Chrome Lettering
    Door Molding Removed

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