#Duramax cateye code#

Tow-Haul Mode, Tap Shift, Electric Transfer Case Shifting, Axle Engagement, Duramax Idle Up, Fled Fuel, Starter Solenoid Control, Park-Neutral Starter Interrupt, Shift Interlock, AC Compressor Clutch Control, AC Req Idle-Up, AC Req Fan Control, Cruise Control, Vehicle Lighting, Donor Vehicle Gauge Clusters or any other donor vehicle features/conveniences. Due to the complexity of modern vehicles and their control systems, donor vehicle functions, conveniences or “nice to haves” are not offered or supported in any way as follows: Your harness is set up for standalone use only which in basic terms means the engine will run and the transmission will function. You will not retain control of the AC, tow haul or any other factory features that are controlled through the BCM. It doesn’t mean it can’t be done, just that we don’t support it. This includes any integration with any factory gauges, factory body harnesses, etc. We do not support Duramax integration into late model vehicles. At the time of check-in, the harness will be inspected and subject to additional charges (either mandatory or suggested) if there are any issues with wires, corrosion, pins or connectors.

#Duramax cateye code#

Before we get into “which one is the best?” we’re going to walk through each engine variation by RPO code and talk about the differences and key features between them.Lead time on harness conversion is generally 4-5 weeks from the time it is received and checked in. Between all of the variations, there are really two key trends: (1) more power and performance, and (2) increased emissions restrictions and fuel efficiency.Įngine technology has drastically improved in the last 20 years at the same time as emissions regulations have gotten stricter. Fortunately, today’s engines are able to offer drastic horsepower improvements while still meeting regulations. With the horsepower and torque of the Duramax nearly doubling from 2001 to 2020, this is certainly true for this 6.6L V8 engine. The LB7 is the original production 6.6L Duramax V8. Following success with the performance and reliability of the LB7, this engine became the building block of the Duramax line all the way up until today. Fuel economy on the LB7 was stout at around 20mpg and the IFS suspension included on the HD’s of the time made these cars a great ride compared to Ford and Dodge. Outside of LB7’s sold in California, these engines did not have any emissions control devices such as an EGR (exhaust gas recirculator) or a DPF (diesel particulate filter). The lack of emissions control devices helped boost reliability of these engines as these emissions parts are frequent fault areas on a lot of diesels. Additionally, it had a fixed geometry turbo which saved it from any vane stick or turbo actuator issues. The one crux of the Duramax LB7 to be aware of is the injectors. Injectors on the LB7 were prone to cracking or leaking, which in most cases requires an injector replacement which can run $3k-$4k. Outside of the injector issues, these engines are rock solid. Overall, a great engine, a comfortable ride, and a decent amount of tune-ability for folks looking for additional performance.ĭuramax LB7 Common Problems LLY: 2004.5-2006 The block and internals are strong and the engine itself is certainly capable of surviving the 300k mile mark.įortunately, by now, any old LB7 will probably have had the injector problem fixed. With the Garrett GT3788VA, the LLY Duramax has the largest turbocharger in it out of any other 6.6L Duramax variation.

Given the larger turbo and various other small engine improvements, the LLY has the biggest horsepower gains from a tune only compared to any other variation, with the exception of the L5P Duramax. The LLY engine is very similar to its predecessor. However, the LLY has traded common problems swapping out injector issues for overheating issues and head gasket problems. The LLY is known to overheat easily while towing heavy loads and high-mileage ones are known to blow head gaskets pretty easily. Fortunately, head gaskets are easy and cheap fixes and overheating is only common when towing very heavy things.