Envoy 2WD L6-4.2L (2008)
Specifications) .
2. If any of these measurements are out of specifications, inspect for the following conditions:
*
Worn or damaged suspension components
*
Collision damage
Measuring the D Height
Important: Cross vehicle D height should be within 12 mm (0.47 in) for vehicles equipped with coil springs and (0.31 in) for vehicles equipped
with air suspension.
Important: On vehicles equipped with rear Air Suspension, verify that the ignition key is in the off position before jouncing the vehicle.
1. Lift the rear bumper of the vehicle up about 38 mm (1.5 in).
2. Gently remove your hands and let the vehicle settle.
3. Repeat this jouncing operation 2 more times for a total of 3 times.
Important: A D-height gage block can be used to determine the D-height position. Crate a D-height gage block using metal stock cut to
20 x 30 mm x the published D-height specifications. Refer to Trim Height Specifications (See: Specifications/Mechanical
Specifications/Suspension/System Specifications/Trim Height Specifications) . Use the block as a measuring device only.
4. Measure and record the D height by measuring the vertical distance (2) between the top surface of the axle and the side of the hole center on the
jounce bumper reinforcement bracket.
5. Repeat for the other side of the vehicle.
6. Lift the rear bumper of the vehicle up about 38 mm (1.5 in).
7. Gently remove your hands and let the vehicle settle.
8. Repeat this jouncing operation 2 more times for a total of 3 times.
9. Re-measure the D height as in step 4.
10. The true D height is the average of the measurements from step 4 and step 9. Compare this value to the published D height specifications. Refer to
Trim Height Specifications (See: Specifications/Mechanical Specifications/Suspension/System Specifications/Trim Height Specifications) .
11. If any of these measurements are out of specifications, inspect for the following conditions. For vehicles equipped with coil springs:
*
Worn or damaged suspension components
*
Collision damage
12. For vehicles equipped with Air Suspension, Refer to Air Suspension Description and Operation (See: Steering and
Suspension/Suspension/Suspension Control ( Automatic - Electronic )/Description and Operation) or Trim Height Inspection .
