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Discussion Starter #1
i just noticed, while my truck was parked that it doesnt seem to be sitting level from side to side...the passenger's side seems to sit a bit higher than the driver's side. I held up a level to the tailgate which confirmed this, is anyone elses truck like this? I know the gas tank isn't centered on my truck, its further to the driver's side, but the tank is like 1/8 full when i noticed this.

to my knowledge, no suspension components have been replaced in the truck's 7 year, 152,000 mile lifespan, and when i jumped up and down on the tailgate the suspension was quite squeaky...could it just be time for new shocks?

sorry, i dont know much about suspension

thanks!
 

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The trucks suspension has miles and age on it. Try cranking the torson bar on the side that is sitting lower to level the truck from side to side.
 

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Shocks will not make your truck set level they only asorb shock, unless you use a shock with a spring or air assist.
 

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152,000 on factory shocks! You need new shocks. They won't help level the truck but the ride will improve alot.
 

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The trucks suspension has miles and age on it. Try cranking the torson bar on the side that is sitting lower to level the truck from side to side.
If you adjust the torsion bar more than a little bit, then you will probably need a front end alignment to ensure proper tire wear.
 

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My Truck also Sat lower on the Driver-side than the Passenger-side.........its called the Chevy Lean,

Below is a G.M. Service Bulletin Regarding the......Vehicle Chevy Lean,
Subject Vehicle Lean - Left Front Sits Low or Right Rear 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).

.....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 N·m (70 lb ft).

Install the anchor plate, new longer U-bolts, P/N 15872655, and nuts.
Tighten
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.

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"

Here are 3 other Truck Forum's.....that call it......the Chevy Lean,

GMFS,
http://www.gmfullsize.com/forum/showthread.php?t=38023&highlight=Chevy+lean

Fullsize Chevy,
http://www.fullsizechevy.com/forum/general-discussion/street/378152-chevy-lean-anyone-done.html

G.M Trucks,
http://www.gm-trucks.com/forums/index.php?showtopic=83565&pid=671623&mode=threaded&start=#entry671623






 

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My Truck also Sat lower on the Driver-side than the Passenger-side.........its called the Chevy Lean,

Below is a G.M. Service Bulletin Regarding the......Vehicle Chevy Lean,
Subject Vehicle Lean - Left Front Sits Low or Right Rear 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).

.....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 N·m (70 lb ft).

Install the anchor plate, new longer U-bolts, P/N 15872655, and nuts.
Tighten
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.

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"

Here are 3 other Truck Forum's.....that call it......the Chevy Lean,

GMFS,
http://www.gmfullsize.com/forum/showthread.php?t=38023&highlight=Chevy+lean

Fullsize Chevy,
http://www.fullsizechevy.com/forum/general-discussion/street/378152-chevy-lean-anyone-done.html

G.M Trucks,
http://www.gm-trucks.com/forums/index.php?showtopic=83565&pid=671623&mode=threaded&start=#entry671623






That is some great information. My truck has had the lean as long as I have had it, but its got 313,000 km on the springs (almost 200,000 miles) and the whole truck is off-center, so I have just decided to live with it. (Both right wheels stick out 3/4" to 1" further toward the outside of the truck than the left wheels, and the left side of my rear bumper sits farther away from the box than the right, which in turn causes my trailer hitch to not line up properly with the bumper). But, for people whose trucks arent completely crooked, this is great information to fix a very common problem.
 

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With that many miles I would have thought that the weight of the driver over that period of time made the springs do that. Since not every time there is someone in the passenger seat. This is some good info. Thanks.
 

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Discussion Starter #9
thanks! i think ill just live with it.
 
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