If you tune GM engines with HP Tuners, you know how much time goes into setup before you ever change a table. Building channel lists, laying out gauges, writing math for wideband and VE work, and digging up injector data for a swap all take hours. We’ve packaged up the files we use in our own shop and put them in the Midgard Industries shop as instant digital downloads.

HP Tuners VCM Scanner Packages: Gen 3, Gen 4 and Gen 5 GM

Each package is $10 and comes as one ZIP with an Analog folder and a Serial folder, so it works whether your wideband feeds the MPVI2 Pro Link analog input or a serial connection. Each one also includes a five-page setup guide.

GM Gen 3 VCM Scanner Package — built for P01/P59 swaps, with the focus on getting a swapped or cammed engine to idle and drive right.

  • Idle Control and Master layouts, with separate idle and part-throttle/WOT channel configurations
  • 6 math definitions: AEM lambda and lambda error, estimated horsepower, in-gear and Park/Neutral idle airflow sums, and an IAC step estimate
  • 2 channel configurations and 2 layouts in both the Analog and Serial versions

GM Gen 4 VCM Scanner Package — built for Gen 4 trucks and cars, with a GMVE layout for dialing in VE tables.

  • General and GMVE channel configurations, paired with Master and GMVE layouts
  • Analog math: Lambda Error, GMVE closed loop, GMVE open loop (single wideband), Estimated Horsepower
  • Serial math: AEM Serial Lambda, AEM Serial Lambda Error, GMVE closed loop, GMVE open loop serial, Estimated Horsepower

GM Gen 5 VCM Scanner Package — built for direct-injection Gen 5 engines.

  • One clean channel configuration and layout in both Analog and Serial versions
  • GMVE closed loop and open loop math, Lambda Error, and MAP/Baro ratio math
  • MAP/Baro pressure-ratio graph axes

What these are and aren’t: these are scanner configuration and reference files, not a vehicle tune. They don’t include HP Tuners software, credits, interface hardware, a wideband, or cables. The guide walks you through backing up your current configuration and loading the math into free User Math slots.

Gen 4 GM Stock Injector Data Converted for Gen 3 HP Tuners Tunes

Gen 4 truck injectors are cheap, plentiful and a popular upgrade on Gen 3 swaps. The catch is that the Gen 4 E38 and Gen 3 P01/P59 store injector data differently, so you can’t just copy tables across. We’ve converted the data for nine common GM stock injectors into Gen 3 HP Tuners format:

GM Part #Flow Rate
1942133329 lb/hr
1256911333 lb/hr
1258726933 lb/hr
1259451236 lb/hr
1261341138 lb/hr
1257634142 lb/hr
1260974950 lb/hr
1261341250 lb/hr
1259864652 lb/hr

Each workbook is a branded Excel file with the key tables for a P01/P59 tune:

  • Injector flow rate vs. kPa vacuum
  • Minimum injector pulsewidth
  • Injector offset vs. battery voltage and kPa vacuum
  • Short pulse adder

Flow-rate and offset tables cover both returnless (non-referenced) 58 PSI and manifold-referenced 58 PSI fuel systems, so you can match the data to how your swap is plumbed.

Workbooks are $5 each, or get all nine in the Gen 4 to Gen 3 Injector Data Bundle for $25.

Don’t Want to Tune It Yourself? Mail In Your PCM

If you’d rather have it done for you, we offer mail-in base tunes for LS swaps. Your PCM ships back within 1–2 business days of arriving at our shop (shipping time not included).

Gen 3 P01 / P59Gen 4 E38
Stock / Near-Stock Base Tune$100$200
Cammed / Modified Base Tune$150$250

E38 tunes include TCM programming for 4L60E/4L80E swaps — just send the TCM along with your ECU. Every base tune includes VATS removal, injector and MAP setup, electric fan control, transmission configuration, displacement and diagnostics setup, and a safe startup calibration to get your swap running. Plus $10 return shipping (US only).

Order your mail-in LS swap base tune here →

Not sure which package or injector file fits your build? Contact us or call (430) 215-4536. Browse everything at midgardind.com/shop.