diff --git a/SENT-box/firmware/sent_gm_fuel_sensor.h b/SENT-box/firmware/sent_gm_fuel_sensor.h
deleted file mode 100644
index 69bbd33..0000000
--- a/SENT-box/firmware/sent_gm_fuel_sensor.h
+++ /dev/null
@@ -1,62 +0,0 @@
-#pragma once
-
-#include "ch.h"
-#include "hal.h"
-#include "sent_conf.h"
-
-class SentGmFuelSensor {
-    public:
-
-/* GM DI fuel pressure, temperature sensor decoded data */
-int32_t gm_sig0;
-int32_t gm_sig1;
-int32_t gm_stat;
-
-/* GM DI fuel pressure, temperature sensor data */
-int32_t gm_GetSig0() {
-    return gm_sig0;
-}
-
-int32_t gm_GetSig1() {
-    return gm_sig1;
-}
-
-int32_t gm_GetStat() {
-    return gm_stat;
-}
-
-void read(uint8_t nibbles[SENT_MSG_PAYLOAD_SIZE]) {
-                    /* Sig0 occupies first 3 nibbles in MSB..LSB order
-                     * Sig1 occupies next 3 nibbles in LSB..MSB order */
-                    gm_sig0 =
-                        (nibbles[1 + 0] << 8) |
-                        (nibbles[1 + 1] << 4) |
-                        (nibbles[1 + 2] << 0);
-                    gm_sig1 =
-                        (nibbles[1 + 3] << 0) |
-                        (nibbles[1 + 4] << 4) |
-                        (nibbles[1 + 5] << 8);
-                    gm_stat =
-                        nibbles[0];
-}
-
-int32_t gm_GetPressure() {
-    /* two pressure signals:
-     * Sig0 occupies 3 first nibbles in MSB..LSB order
-     * Sig1 occupies next 3 nibbles in LSB..MSB order
-     * Signals are close, but not identical.
-     * Sig0 shows about 197..198 at 1 Atm (open air) and 282 at 1000 KPa (9.86 Atm)
-     * Sig1 shows abour 202..203 at 1 Atm (open air) and 283 at 1000 KPa (9.86 Atm)
-     * So for 8.86 Atm delta there are:
-     * 84..85 units for sig0
-     * 80..81 units for sig1
-     * Measurements are not ideal, so lets ASSUME 10 units per 1 Atm
-     * Offset is 187..188 for Sig0 and 192..193 for Sig1.
-     * Average offset is 180.
-     */
-
-    /* in 0.001 Atm */
-    return ((gm_GetSig0() - 198 + 10 + gm_GetSig1() - 202 + 10) * 100 / 2);
-}
-
-};
\ No newline at end of file
diff --git a/ext/libfirmware b/ext/libfirmware
index 63ffcdb..0f2fb56 160000
--- a/ext/libfirmware
+++ b/ext/libfirmware
@@ -1 +1 @@
-Subproject commit 63ffcdbe07015e46609248d88caf4f7d31bcd7db
+Subproject commit 0f2fb56c8c7b62761b2268e62e4880d8efd57fce