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Thread: GM Lean :(
09-25-2011, 02:13 PM #1
GM Lean :(
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"
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
4.3L V6, 4L60E, 2WD, Single Cab
Poweraid TB Spacer
Flowmaster 10-series exhaust (dumped)
Edge CS insight monitor
LS-1 Dual Electric fans
Corvette tranny servo swap
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)
305/70R16 NITTO Terra Grapplers
16" PROCOMP 7089's
2" leveling kit
3" Fabtech Spindle Lift Kit
Front/Rear-Bilstein 5100 shocks
35W HID Low Beams
RECON LED smoked roof cab lights
HELLA LED taillights and 3rd brakelight
HELLA FF-75 Aux. Reverse Lamps
RIGID dually D2, flush mount, wide beam
Hawk HPS Brake pads
Russell braided steel brake lines
Powerstop-red powdercoated brake calipers
Powerslot Cryo brake rotors
EGR in-channel window visors
09-25-2011, 02:25 PM #2
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
09-25-2011, 03:07 PM #3
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 (½ Ton) series
Models: 1999 to 2007 GMC Sierra (Classic) 1500 (½ Ton) Series
With Two-Wheel Drive
This bulletin is being revised to update the models to reflect that bulletin only applies to 1500 (½ Ton) Series. Please discard Corporate Bulletin Number 06-03-06-005 (Section 03 -- Suspension).
Have commented that their vehicle appears to lean. In most cases, the vehicle will sit low left front or high right rear.
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 to 95 N·m (70 lb ft).
Install the anchor plate, new longer U-bolts, P/N 15872655, and nuts.
Tighten the nuts to 72 N·m (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.
Description .....Rear Spring Spacer
Description......Rear Spring U-Bolt
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.
5.3 l 3.73 l G80
BLACK BEAR CUSTOM TUNE
SNUGTOP l COLORMATCH l KATZKIN
09-25-2011, 09:41 PM #4
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?
09-26-2011, 01:36 AM #5
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.
09-26-2011, 03:14 AM #6
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!
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