50038 Columbia River Hwy, Scappoose, OR · 25 minutes from Portland on Hwy 30OPEN MON–FRI 7:30–5:30 · Same-day answers, real person
Pro Automotive & Diesel
BOSCH CERTIFIED × 2Diesel fuel injection rebuild and install under one roof
(971) 298-9384
Ask for the fuel injection desk
2017–2025 Silverado & Sierra 2500HD / 3500HD

The L5P finally has a real answer to CP4 failure.

The Alliant Power / Bosch DCR conversion replaces the CP4.2 in your Duramax with a pump that survives bad fuel — installed by a Bosch certified shop, not shipped out to one.

2017–2025 Silverado / Sierra 2500HD & 3500HD
Genuine Bosch DCR pump — Alliant Power 608990
49-state legal (not for sale in California)
Authorized Alliant Power Master dealer
SEPTEMBER SALE — $4,499 installed, regular price $5,500. Offer ends September 30, 2026.
Call (971) 298-9384Reserve my pump → SEPTEMBER SALE · PRO AUTOMOTIVE & DIESEL · SCAPPOOSE OR REG $5,500 $4,499 INSTALLED THIS MONTH ONLY
LIMITED PUMP SUPPLY

Reserve a DCR pump for your L5P

Pumps are on national backorder. Reserve yours and we’ll hold the install slot.

We reply the same business day. No robocalls, no spam — one text or call from a real person in Scappoose.
Bosch certified rebuild & install — same roof
Authorized S&S Diesel & Alliant Power Master dealer
4.6 stars · 713 Google reviews
2-year warranty · 2-day typical turnaround
Fits2017–2019 L5P2020–2022 L5P2023–2025 L5P2500HD3500HDFleet units
Supply is tight nationwide — reserve now and we hold your pump and your bay when it lands.

The failure, drawn outGM used the same CP4.2 — and it ends the same way

When the CP4 in an L5P comes apart it does exactly what it does in a Ford: metal moves forward through the injectors, rails, lines and tank, and the repair runs $15,000 and up on a truck that is often still being paid for.

WHAT HAPPENS WHEN THE CP4.2 COMES APARTFUEL TANKcontaminatedLIFT PUMPpushes debrisCP4.2 PUMPmachines itselfFUEL RAILSmetal arrives8 INJECTORSscored, junk$15,000+ repairAFTER THE CONVERSIONFUEL TANKcleanLIFT PUMPnormal dutyBOSCH DCRself-lubricatedFUEL RAILSprotected8 INJECTORSuntouched$4,499 installed, one visit
Top row: the path debris takes once the pump starts machining itself. Bottom row: the same truck after the conversion.
WHAT IT COSTS EITHER WAY $4,499 in September sale price, installed — offer ends September 30 $5,500 regular price what the same conversion costs from October on $15,000+ after the pump fails plus 2–4 weeks down A grenaded CP4 takes the pump, injectors, rails, lines and tank with it — dealer replacement runs $15,000 and up. Our own cleanup tickets have billed $5,218 and $7,669 on top of the conversion once metal moved through the system. Prevention is a fraction of the cleanup — and the cleanup is not optional once it happens.

Why do itUntil now, a 2017-and-newer Duramax had no conversion at all

For years the only options were a disaster-prevention filter or another CP4 waiting to fail. The Alliant Power / Bosch DCR pump changes that — a genuine Bosch conversion, installed in our own bays by an authorized Alliant Power Master dealer.

  • Genuine Bosch DCR pump supplied through Alliant Power — not a rebuilt CP4
  • Fixes the design problem instead of filtering its debris
  • Keeps emissions equipment and factory calibration in place
  • Installed and tested by the shop that rebuilds Bosch pumps every day
  • 49-state legal — not sold into California
SEPTEMBER SALE · ENDS SEPT 30
L5P DCR CONVERSION, INSTALLED · SEPT SALE
Regular $5,500SAVE $1,001
$4,499
Complete: Bosch DCR pump, conversion kit, fluids, labor, road test
Pump supply is limited — a deposit reserves your unit and your install date. 49-state legal; not sold into California. If the pump has already failed, the fuel-system cleanup (tank, lines, injectors) is quoted separately after inspection. $4,499 is the conversion on a running truck. September sale: $4,499 installed, regular $5,500 — offer ends September 30, 2026.
L5P Duramax Silverado 2500HD
An L5P Duramax in our shop — every conversion is done here on Highway 30, start to finish.
THE KIT WE INSTALL

The Alliant Power DCR conversion for the L5P

AUTHORIZED ALLIANT POWER
MASTER DEALER

The 2017-and-newer L5P gets the Alliant Power DCR pump: a new high-pressure pump built to survive the fuel the CP4.2 cannot. It is the pump we buy for every one of these jobs, it lists at $4,266 by itself, and at $4,499 installed this month you are paying barely more than the part to have it in the truck and road tested.

Alliant Power DCR conversion kit
The Alliant Power DCR kit as it ships — part 608990 / item DKT20048, pump, lines and hardware. This is the kit that goes in your truck.
The pump itself: what comes out of the truck, and what goes back in.
Pumps on our Bosch bench in Scappoose — tested here, not shipped out.
ALLIANT POWER 608990 · ITEM DKT2004849-STATE LEGAL

GM L5P DCR Fuel Injection Pump Conversion

Alliant Power® — brand-new DCR pump, not a rebuild and not a used unit

  • Brand-new Alliant Power DCR pump — part 608990, list price $4,266
  • Fits 2017 to current Silverado / Sierra 2500HD and 3500HD with the L5P Duramax
  • 49-state legal — keeps every factory emissions component in place
  • Installed and tested by Bosch certified fuel injection techs, same roof
  • Pump supply is tight right now — we hold one for your appointment
Not sold in California. On the Ford and the LML we fit S&S Diesel Motorsport kits; on the L5P the Alliant Power DCR is the pump we install.
Photography from our own bench and bays in Scappoose; kit photo courtesy of Alliant Power. The Alliant Power DCR pump is bought new for every job — no rebuilds, no used pumps.

Why hereNobody knows your fuel system better than we do

A DCR pump is only as good as the hands that install it. We are a Bosch certified rebuild facility under the same roof as a Bosch certified install facility — and an authorized Alliant Power Master dealer, which is how we get pumps at all right now.

Bosch certified, twice over

We rebuild and test Bosch pumps and injectors on calibrated equipment here in Scappoose, then install them ourselves.

Alliant Power Master dealer

Authorized dealer access is the reason we can source 608990 while supply is tight — genuine parts with real warranty coverage.

4.6

713 reviews, 4.6 stars

Twenty years on Highway 30 serving Portland, Vancouver, St. Helens and the lower Columbia.

What you getEverything in the flat price

  • Genuine Bosch DCR pump (Alliant Power 608990) with warranty
  • Complete conversion kit: lines, fittings, bracket, hardware
  • Full fuel-system inspection before any parts go on
  • New filters and fluids, system primed and bled
  • Road test and a printed test report from our own bench
  • Two-day typical turnaround once your pump is in hand

How it goesFour steps, one shop, nothing shipped out

1CALL OR TEXTThree questions and you get a realnumber, not a range.2INSPECTFuel sample first. If debrisalready moved, you know before westart.3CONVERTBosch certified tech installs it;the pump is tested on our ownbench.4ROAD TESTPrinted test report, warranty inhand, keys back — usually twodays.

Our own bays and benchThe bench, the pump and the bays behind the price

Bosch pumps on our bench — tested and documented, never drop-shipped and hoped for.
Injectors pulled from a contaminated Duramax fuel system.
Customer L5P Silverado in for its DCR conversion.
Injection pump work on our own bench — measured, not guessed.
The pump itself: what comes out, and what goes in.
Calibrated Bosch test equipment: pass or fail is measured, not guessed.
50038 Columbia River Hwy, Scappoose — 25 minutes from downtown Portland.
“Two shops told me to put another CP4 in it and cross my fingers. These guys had a real conversion and did it in two days.”Google review · Pro Automotive & Diesel, Scappoose

Straight answersQuestions we get every week

Is the DCR pump available right now?Supply is tight nationwide. As an authorized Alliant Power Master dealer we can reserve one for your truck — a deposit holds the pump and the install date.
Is it legal in my state?It is 49-state legal and keeps emissions equipment in place. It is not for sale in California.
Does it affect my factory warranty?On a truck still in warranty we will walk you through it honestly. Most of our conversions are on trucks where the owner is carrying the $15,000-plus risk himself.
What if my pump already failed?We inspect and sample the fuel first, then quote the contamination cleanup separately so you see exactly what it costs before we start.
How long do you need the truck?Two days once the pump is here. Fleet units are scheduled back-to-back.
Do you see Duramax trucks from Portland and Vancouver?Weekly. We are 25 minutes out Highway 30, with shuttle and loaner options.
Call (971) 298-9384Send my details →
L5P DCR conversion — September sale $4,499 installed (reg $5,500), limited pump supplyCall (971) 298-9384