2008 Chevrolet Impala Lug Nut Torque & Bolt Specs

The 2008 Chevrolet Impala lug nut torque is 100 ft-lbs (135 Nm) on M12x1.5 studs. Torque in a star pattern in two passes (snug, then final), and re-check after the first 50–100 miles of driving. Use a calibrated torque wrench — not an impact gun — for the final pass.

Lug nut torque: 100 ft-lbs (135 Nm) · Thread: M12x1.5.

This page is the OEM-referenced fastener summary for the 2008 Chevrolet Impala. Use it before any maintenance or repair job where torque values matter — brake work, wheel changes, suspension service, engine teardowns, or oil changes. Specs are pulled from manufacturer service literature, cross-checked against community data, and updated as new chassis variants become available.

GM lug-nut torque clusters around 140 ft-lbs (190 Nm) for half-ton Silverado/Sierra and 100 ft-lbs for passenger cars like Malibu, Impala, and Cruze. GM heavy-duty trucks (2500HD/3500HD) jump to 165 ft-lbs. Most GM passenger cars use a 19mm socket; trucks moved from 22mm to 22mm-with-deep-well in 2014. Watch for GM's flat-flange lug nut design on the Silverado — the standard cone-seat aftermarket lugs will not seat correctly.

Common fastener categories on the 2008 Chevrolet Impala

Wheel / lug nut torque and thread spec (covered above)
Brake caliper bracket bolts (typically 80-130 ft-lbs) and slide/guide pins (18-35 ft-lbs)
Engine oil drain plug torque — rarely above 30 ft-lbs; always use a new crush washer
Transmission pan, valve cover, and intake manifold bolts (low torque, often 89-106 in-lbs)
Suspension control arm, sway bar, tie rod end and ball joint torque
Spark plug torque (typically 10-15 ft-lbs on aluminum heads — do not exceed)
Differential cover bolts (RWD/4WD only) and transfer case fasteners

Repair guidance for this model year

For 2008 model-year work: Always use a calibrated torque wrench for safety-critical fasteners, and replace lock washers and crush washers on every reassembly.

Tools you will need

Metric socket set (8mm-22mm), 6-point impact-rated
Calibrated torque wrench (10-150 ft-lbs covers most automotive jobs; add a 0-250 ft-lbs wrench for truck lug nuts)
Breaker bar (24" minimum) for initial loosening
Penetrating oil (PB Blaster or Kroil) for any fastener over 5 years old
Anti-seize on stainless or dissimilar-metal threads; thread-locker (Loctite blue) on critical reassembly

Frequently asked questions

What is the lug nut torque on a 2008 Chevrolet Impala?

The OEM-specified lug-nut torque for the 2008 Chevrolet Impala is 100 ft-lbs (135 Nm) on M12x1.5 thread studs. Use a calibrated torque wrench in a star pattern, in two passes (50% and 100%), and re-check after 50-100 miles of driving.

What socket size do I need for the 2008 Chevrolet Impala lug nuts?

Most modern Chevrolet vehicles use a 19mm or 21mm socket. Older Chevrolet models from before 2000 may use a 13/16" SAE socket on certain trims. Confirm against the actual lug before purchasing aftermarket wheels.

Are the 2008 Chevrolet Impala fasteners metric or SAE?

Metric is the standard for this vehicle. Most fasteners on this vehicle are metric (M6, M8, M10, M12, M14). Bring a full metric set; SAE substitutes can round the head. Bolt-head markings are the fastest way to confirm grade and material at the bench.

Other Chevrolet Impala years

Same model, different model year — fastener spec may change. Always confirm against the year for your VIN.

→ 2008 Chevrolet Impala oil drain plug torque & size

All 7 2008 Chevrolet Impala fastener specs

Per-bolt torque, wrench size, and thread spec for the 2008 Chevrolet Impala, sourced from OEM service literature and verified against community shop data. Values pair imperial (ft-lb) and metric (Nm) where the manufacturer publishes both.

Wheels — 2008 Chevrolet Impala

Wheel and lug nut spec for the 2008 Chevrolet Impala. At the all wheels, the lug nut torques to 100 ft-lbs (135 Nm) (M12x1.5 thread).

Engine — 2008 Chevrolet Impala

Engine bolt-by-bolt torque for the 2008 Chevrolet Impala, including the long block, valve covers, and intake. plan for a 13mm tool on a M8x1.25 stud; final torque is 18 ft-lbs (24 Nm) (water pump bolt). Oil drain plug tightens to 18 ft-lbs (25 Nm), takes a 15mm driver, runs on M12x1.75 threads. The engine mount through bolt uses a 18mm drive on a M12x1.75 thread, torqued to 85 ft-lbs (115 Nm). The spark plug torques to 11 ft-lbs (15 Nm) (18mm drive, M14x1.25 thread). plan for a 15mm tool on a M10x1.5 stud; final torque is 26 ft-lbs (35 Nm) (exhaust manifold bolt).

Suspension — 2008 Chevrolet Impala

Suspension and chassis fastener torque for the 2008 Chevrolet Impala — strut, control arm, and sway bar values. Lower control arm rear bolt tightens to 85 ft-lbs (115 Nm), takes a 18mm driver, runs on M12x1.5 threads.

New to torquing wheels? Read our How lug nut torque works — the complete guide for star-pattern sequence, re-torque intervals, and how to read a lug spec — then use the 2008 Chevrolet Impala numbers above.

Loading the interactive 2008 Chevrolet Impala fastener lookup with per-bolt filtering, part links, and torque tools…