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Genuine GMC Sonoma Crankshaft
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7 Crankshafts found
GMC Sonoma Engine Crankshaft
Part Number: 12555637$492.97 MSRP: $815.92You Save: $322.95 (40%)Ships in 1-3 Business Days
GMC Sonoma Crankshaft
GMC Sonoma Crankshaft is the part that changes the up and down movement of the pistons into the spinning motion that ultimately turns the transmission and wheels, making it the heart of the truck's power delivery. Inside the cylinder block, the Crankshaft is supported by precision journals, each connected to offset throws to which the connecting rods are attached and where the change in motion from straight to circular takes place. GMC engineers cast many low output versions made of durable cast iron while high horsepower mills rely on forged steel Crankshaft units for extra toughness. Regardless of the material, the Crankshaft is designed to last the life of the vehicle with regular oil changes to prevent debris and heat from getting out of hand. If dirt starves the bearings of lubricant, journals can score, clearances widen and the Crankshaft will knock and send harsh vibrations through the Sonoma engine, signaling replacement time. From the first compact pickup years to later models, GMC kept the same basic single-piece layout, meaning every Sonoma shares a familiar rhythm, though stronger forged options appear in performance packages. Because of this shared design, sourcing a factory-spec unit remains straightforward for GMC owners, and any Sonoma with the proper support tools can accept a new shaft in a demanding but doable weekend project.
Each OEM GMC Sonoma Crankshaft we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.
GMC Sonoma Crankshaft Parts Questions & Experts Answers
- Q: How to check the endplay of a crankshaft before removing it on GMC Sonoma?A:Before removing the crankshaft, check the endplay by mounting a dial indicator with the stem aligned with the crankshaft and touching one of the crank throws. Push the crankshaft to the rear and zero the dial indicator, then pry it to the front as far as possible to check the reading; the distance moved indicates the endplay. If it exceeds the specified limit, inspect the crankshaft thrust surfaces for wear, and if no wear is found, replacing the main bearings should resolve the issue. If a dial indicator is unavailable, use feeler gauges by prying or pushing the crankshaft to the front and slipping the gauges between the crankshaft and the thrust main bearing to measure the clearance, which reflects the endplay. Loosen the main bearing cap bolts a quarter turn at a time until they can be removed by hand, checking for markings on the caps to identify their locations, usually numbered from the front to the rear; if unmarked, use stamping dies or a center-punch to label them. Most caps have a cast-in arrow indicating the front of the engine. Gently tap the caps with a soft-faced hammer to separate them from the engine block, using the bolts as levers if necessary, and take care not to drop the bearing insert if it comes out with the cap. Finally, lift the crankshaft out of the engine, ideally with assistance due to its weight, and with the bearing inserts in place, return the caps to their respective locations on the engine block and tighten the bolts finger tight.
