How to Replace a Starter on 2008 Chevy Impala | Step-By-Step

Replacing the starter on a 2008 Chevy Impala requires disconnecting the battery, removing two 15mm bolts, and installing the new unit at 32 lb-ft of torque.

Learning how to replace a starter on 2008 Chevy Impala saves you $140–$200 in labor — the repair takes about two hours with basic metric tools, and the part alone runs $274–$642. These steps apply to the 3.5L and 3.9L V6 engines found on most 2006–2013 Impala models. The 5.3L V8 in the SS has a different starter location and is covered separately below.

Tools and Parts You’ll Need

You’ll need a full set of metric sockets: 10mm for the battery terminals and air deflector, 13mm for the main power wire, and 15mm for the two starter mounting bolts. A 3/8″ ratchet with several extensions — up to three linked together — plus a swivel socket makes the lower bolt reachable. A torque wrench is non-negotiable: both bolts get tightened to exactly 32 lb-ft. Over-torquing risks cracking the housing; under-torquing lets the starter shift and grind. A magnetic pickup tool is also handy in case a bolt drops into the bell housing opening — a common frustration on this job.

Other supplies include a trim tool set for plastic covers, pliers, a pick for the snap connector, gloves, and safety glasses.

For the starter itself, brands like ACDelco, Bosch, TRQ, and Duralast all make compatible units. Model numbers vary by engine size, so confirm by VIN before ordering. Prices span $274–$642, and comparing options helps narrow the choice. Our roundup of the best 08 Impala starters compares top-rated models to simplify your decision.

Step-by-Step Starter Replacement

Start by disconnecting the negative battery cable with a 10mm socket. Mark the cables with tape or a photo to avoid confusion when reconnecting — crossing them can damage the alternator or computer modules. Raise the vehicle on jack stands and remove the front lower air deflector: three 10mm bolts hold it in place. If a torque converter cover is present, remove it too. On 3.5L and 3.9L engines, the starter is on the passenger side, bolted to the transmission bell housing. A detailed replacement video from 1A Auto walks through the full removal sequence visually if you prefer a video reference.

Remove the electrical connections first. The large power wire uses a 13mm nut; the smaller ignition wire uses an 8mm or 10mm nut. A snap connector clips to the solenoid — use a trim tool or pick to gently pry the tab and disconnect it without breaking the plastic. Then remove the two 15mm mounting bolts. The upper front bolt is straightforward; the lower rear bolt needs a long extension and often a swivel socket to reach the awkward angle. Be careful not to drop either bolt into the bell housing — if one falls, retrieve it with the magnetic pickup tool before proceeding. Pull the starter left and down, wiggling it free from the bell housing, and set the bolts aside.

Position the new starter in the same spot. Hand-tighten the first mounting bolt to avoid cross-threading, then torque both bolts to 32 lb-ft. Reconnect the wires in reverse order: large power wire first (13mm nut), then small ignition wire (8mm or 10mm), then snap the connector back on until it clicks. Before reinstalling the air deflector, double-check that both bolts are at the correct torque and all three wire connections are seated firmly — a loose power wire causes intermittent starting issues that are hard to diagnose later. Reinstall the torque converter cover and air deflector, reconnect the negative battery cable, and test the start. The engine should crank immediately with no grinding or hesitation.

What Does a Starter Replacement Cost?

Labor rates above assume a shop or dealer; dealer pricing lands at the high end of the range. DIY saves the entire labor cost — you only pay for the part. The 5.3L V8 in the 2008–2009 Impala SS mounts the starter on the driver’s side and often requires engine-bay access from above, which can increase both labor time and cost. Always confirm your engine size and starter model by VIN before purchasing, since a mismatched starter won’t engage the flywheel correctly.

FAQs

Can I replace the Impala starter without removing the air deflector?

Technically possible on some cars, but removing the front lower air deflector (three 10mm bolts) gives you the clearance to reach the lower mounting bolt and the electrical connections. Skipping this step usually means fighting for space and risking stripped bolts, and it saves only a few minutes.

How do I know if the starter or the battery is the problem?

A bad battery usually cranks slowly before dying completely, while a bad starter produces a single click or silence with no crank at all. With a dead battery the dashboard lights dim when you turn the key; with a bad starter the lights stay bright but the engine doesn’t turn over.

What happens if I tighten the starter bolts wrong?

Exceeding 32 lb-ft can crack the starter housing or strip the mounting threads in the bell housing. Under-tightening lets the starter shift under load, causing a grinding noise and eventual failure. A torque wrench is the only reliable way to get it right — guessing by feel is not accurate enough for this job.